Paper Industry Biocides

Specialty Chemicals by BASF

Paper industry biocides

BASF Biocides

P A G E 2

Innovation, preservation and disinfection

P A G E 3

BASF Biocides - protecting the worldThe biocide business for Specialty Chemicals, BASF AG

BASF is one of the world’s leading suppliers ofspecialty biocides. We create products that makelife safer, simpler and more comfortable formillions of people worldwide.

Our high performance biocides are used in everyaspect of life. From toiletries, to air conditionersused in both industry and home, from Iceland toEquador our technology spans the globe inpreservation and disinfection. We help to protectthe lives of millions of people across the worldevery day.

Through our product range, marketing expertise,technical and regulatory knowledge, BASF’sinnovative biocides approach positions thebusiness at the very forefront of antimicrobialtechnology. The marketing, technical and researchand development headquarters for BASF’sspecialty biocide business is located inNottingham.

Our products are made in ‘state of the art’manufacturing facilities at Cramlington, Englandand Ludwigshafen, Germany. In each of ourplants, the expert integration of process andenergy requirements leads to manufacturingefficiencies and quality production.

To demonstrate our commitment to our customers,we have made significant investment in long termdedicated biocide resources within Europe, AsiaPacific and the USA.

In 2000, we established a direct presence in theUSA with a new dedicated marketing andtechnical centre based at BASF Corporationheadquarters in Mount Olive, New Jersey. Productis supplied through an integrated BASFwarehousing facility in Charlotte, North Carolina.Our US operation is part of BASF Corporation’sChemical Division, situated in Mount Olive, NewJersey.

How we work for you

BASF’s biocides are sold through BASF’sestablished network of sales offices worldwide. Inthis way, we aim to offer valuable local supportand the highest standards of customer excellence.

Working with BASF provides access to manyessential regulatory approvals. For example ourEPA registrations allow products and customerformulations to be sold in the USA and ourapprovals ensure supply to the paper industry inthe Nordic area. We are also well positioned tosupport our actives under the European BiocidalProducts Directive.

We believe in long-term commitment to ourproducts and customers and this is reflected inour substantial registrations and the data requiredto obtain them. To this end many of our productsare supported with extensive safety andenvironmental data packages.

In addition, BASF is committed to providing thehighest standard of health, safety andenvironmental protection as part of ourcommitment to Responsible Care. We continuallyresearch and innovate to produce the mostadvanced products on the market.

At BASF, we are also constantly reviewing ways inwhich we can improve our products and servicesto ensure that we keep pace with the rapidlychanging developments in information technology.BASF is harnessing these changes and ensuringthat we are aligned with our customer’srequirements, making it more efficient andconvenient for you to do business with us.

BASF’s specialty biocide products are marketedunder the Myacide® and Protectol® trade names.

P A G E 4

Introduction to the Paper Biocide Industry

Microbiological Problems in thePaper IndustryThe paper and paperboard industry is highlydiverse. Products range from specialised papersfor currency printing through to tissue andnewsprint production and the manufacture ofpaperboard for packaging. Each of these areasdemands different approaches in terms of the rawmaterials used and the various additives neededto arrive at an acceptable finished product.

All of these areas, however, depend on a basicprocess where the paper fibres are suspended ina large volume of recirculating water before beingremoved by filtration and compacted and dried toform the paper sheet. Various water-basedadditives are also used to improve the efficiencyof the process and control the quality of thefinished paper. These include flocculants,retention aids, fillers and paper coatings.

These conditions, together with the operatingtemperatures, which are normally above 30˚C,provide the ideal environment for the growth ofmicroorganisms, mainly bacteria. Contaminationmay originate from the air, fresh water, virgin andrecycled pulp or waste water.

In the manufacturing process, this can result in thebuild up of slime at key points in the process. Ifuncontrolled, the slime can accumulate andeventually break away, leading to problems such as

paper breaks, spray nozzle blockage anddiscolouration of the finished product. Problemorganisms are the aerobic slime-forming bacteriasuch as Pseudomonas, Klebsiella, Enterobacter andBacillus spp. Anaerobic organisms such as theDesulphovibrio spp. can also accumulate underslime layers and other deposits leading to theproduction of foul odours and corrosive by-products.

Water-based mill additives including mineralslurries and paper coatings are also prone tocontamination and require adequate preservationto ensure that their stability is not compromised.The major spoilage organisms are aerobicbacteria such as those mentioned above but insome instances yeasts such as Candida andSaccharomyces spp. and moulds such asAspergillus spp. can be involved. Consequentlythere may be a need for broad spectrumpreservation in many of these additive products.Preservation of bulk pulp may also be requiredduring unplanned plant shut-downs.

The occurrence of these contamination andspoilage problems creates a demand forantimicrobial products, which can be ideallysatisfied by products from BASF’s specialtychemical biocide range.

CONTENTS

P A G E

Myacide® AS, AS Plus and S1/S15/S30 Biocide 6

Protectol® GA 50 / GA 24 Biocide 10

Protectol® DZ / DZ P Biocide 12

Protectol® HT Biocide 14

P A G E 5

P A G E 6

Myacide® AS, AS Plus and S1/S15/S30 Biocide

Myacide AS biocide is the industrial grade of 2-Bromo-2-nitropropane-1,3-diol or Bronopol. Itprovides highly effective antimicrobial activity foruse in diverse and demanding industrial biocideapplications, combining well-proven efficacy withimportant environmental safety characteristics.The main benefits of Myacide AS in the paperindustry are its proven performance as a slimicideactive ingredient in mill process water and as aneffective preservative for mill additives. The idealphysical and microbiological properties ofBronopol place it in a new generation of products,which can be seen replacing older chemistries.

QUALITY Myacide AS is an off-white to pale yellow, freeflowing, crystalline solid. The product contains aminimum of 98% 2-Bromo-2-nitropropane-1,3-diolalthough typical purity values are significantlyhigher. As supplied it is stable for a minimum of 3years when kept under good storage conditions.

Myacide AS Plus is marketed only in the USA asan EPA end use product. The technicalspecification and product quality are the same asMyacide AS.

Liquid Formulations

A range of commercial formulations is readilyavailable.

Myacide S1 is a 20% (w/v) solution indipropylene glycol monomethyl ether andwater.

Myacide S15 is a 10% (w/w) solution inpropylene glycol and water.

Myacide S30 is a 30% (w/w) solution inpropylene glycol and water.

ANTIMICROBIAL ACTIVITYThe spoilage of paper, pulp, mineral slurries,coatings and other additives is generally due to amixed population of bacteria and to a lesserextent fungi. Bronopol is highly effective,particularly against aerobic slime-forming bacteriasuch as Pseudomonas spp., Klebsiella spp.,Bacillus spp. and the Enterobacter spp. Thefollowing table compares the Minimum Inhibitory

Concentrations (M.I.C.) of Bronopol against sixkey microorganisms.

M.I.C. data is generated according to in-housemethodology.

There have been no reported cases of resistanceto Bronopol in over twenty years of use. Recentfield trials have shown excellent activity againstPseudomonas species resistant to othercommonly used biocides such as those based onisothiazolinones.

USAGE RECOMMENDATIONS

Solubility, Stability and Compatibility

Bronopol is readily water-soluble and solutionscontaining up to 28% w/v are possible at ambienttemperature. The compound also shows a higheraffinity for polar organic solvents (e.g. propyleneglycol 50% w/v) which makes it very easy to useeither as a liquid or a solid.

Bronopol’s stability is one of the most importantfactors in the paper industry for long termpreservation. It shows optimum pH stability in theacidic range with excellent efficacy. At alkalinepH, Bronopol is less stable but still provideseffective control. In these systems, Bronopolreaches an equilibrium with its breakdownproducts, which are also microbiologically active.This self-stabilisation means that preservativeefficacy can be maintained over an extended shelflife even within aggressive, more alkalinematrices.

Test Organism M.I.C. (ppm)

Staphylococcus spp 12.5 - 50

Bacillus spp 12.5 - 50

Desulphovibrio spp 12.5 - 50

Pseudomonas spp 12.5 - 50

Candida spp 400

Aspergillus spp 3200

P A G E 7

Bronopol is compatible with a range of materialsused in the pulp and paper industry such asretention aids, flocculants and other biocides suchas isothiazolinones. In common with other non-oxidising biocides, strong reducing agents andoxidising agents should be avoided. However,Bronopol can be used alongside oxidising biocidesin systems with alternating biocide regimes.

Recommended Dose Rates

Paper Mill Process Water

Myacide AS can be dosed as a solid at aconvenient point early in the recirculating systembut experience has shown that best results areobtained using formulated solutions. It should beadded to the wet end of the machine, the primarywhite water circuit, where good dispersion cantake place. The levels required will depend on thecleanliness of the system, the quality of the rawmaterial and the degree of microbial controlrequired. A typical regime may involve initiallydosing at a level of 50g Myacide AS per tonne offinished paper product, reducing to 10-20g pertonne after 2-3 weeks. When used in combinationwith other biocides, the concentrations of Myacide AS can be further reduced.

Bulk Pulp

To preserve bulk pulp, control foul odours andprevent general biodeterioration of stock, Myacide AS or an associated formulation may bedosed directly into the hydropulper, machinechest or stock chest. In general, a single slugdose of between 50ppm and 250ppm activeshould provide control for up to 3 days or longer,depending on the initial level of contamination. In situations where contamination is high, repeatdosing every 1-7 days may be required.

Paper Mill Additives

Myacide AS or an associated formulation can beused as an effective preservative for a wide rangeof auxiliary products. These include mineralslurries, starch solutions, rosin sizes, polymerdispersions and paper coatings. When used aloneit can be dosed at 100-500ppm active based onfinal product volume. However, in situations whereorganisms tolerant or resistant to otherpreservatives are encountered, the performanceof Myacide AS as a combination biocide isoutstanding. In these situations the dose levels ofeach biocide can be reduced.

P A G E 8

CASE STUDY

The following example (fig.1) demonstrates theefficacy of Bronopol in preserving a typical papermill additive based on calcium carbonate.The procedure used was ASTM E 723-91 atpH 7.5 with a mixed inoculum of Pseudomonasaeruginosa, a second (1,2-Benzisothiazolin-3-one(BIT)-resistant) Pseudomonas species,Enterobacter cloacae and Klebsiella aerogenes.

Myacide AS at a level of >20ppm was able tocontrol this mixed inoculum for a period of sixweeks following a single initial challenge of106cfu/ml and a reinoculation at 21 days. BIT atlevels of up to 200ppm active was unable to controlthe Pseudomonas growth.

SAFETY CHARACTERISTICS

In order to support the safe use of Bronopol, a widerange of toxicological studies have been carriedout. The extensive nature of this database isparticularly helpful in supporting productregistrations and answering any concerns onproduct safety. Bronopol is non-carcinogenic, non-mutagenic, non-embryotoxic and non-teratogenic. Itis also non-phototoxic.

Bronopol is biodegradable and does notaccumulate in the environment. Due to its rapidphotolysis and hydrolysis, Bronopol will not, undernormal use conditions, cause problems to effluenttreatment plants or to the environment followingdischarge into wastewaters.

Bronopol is classified in the EU Council Directive -67/548 EEC as harmful, irritant and dangerous forthe environment.

REGISTRATIONS

NORTH AMERICA

USA

EPA - BASF’s Bronopol is approved for use in paper mill pulp and

process water, starch, pigments and extender slurries. FDA 21 CFR. - Code of Federal Regulations. Listings are:

176.300 - Paper slimicides use.

175.105 - Indirect food contact use in adhesives.

176.170 - Components of paper and paperboard in contact withaqueous and fatty foods.

CANADAHealth Canada have approved the use of BASF’s Bronopol as aslimicide and granted a letter of ‘no objection’ for use in papercoatings intended for food contact.

EUROPE (EU)

DENMARKPaper slimicide registrations and meets Nordic Swan ecolabelrequirements for slimicide use in printing paper.

FINLANDMyacide S1 is registered as a paper slimicide.

Myacide® AS, AS Plus and S1/S15/S30

0

1

2

3

4

5

6

7

8

(200ppm)(20ppm) (100ppm)(50ppm)

Calcium Carbonate Slurry - Bronopol Data(fig.1)

P A G E 9

FRANCEApproved for food contact use as a paper slimicide by theMinistere de la Consommation.

GERMANYBgVV - Recommendations for food-contact applications. XIV,2f - substances added to dispersions to prevent microbialattack.XXXVI, B V11 - paper and board, slimicides.

NETHERLANDSWater and paper treatment registration.

SWEDENMyacide S1 is registered for use as a paper slimicide.Myacide AS meets Nordic Swan labelling requirements forslimicide use in printing paper.

P A G E 1 0

Protectol® GA 50 / Protectol® GA 24Biocide

Protectol GA 50 biocide is a 50% solution of 1,5-Pentanedial commonly known as Glutaraldehyde.It is very effective against a broad spectrum ofbacteria and fungi common to the papermakingindustry and is useful in the prevention of slimebuild-up in all areas of the manufacturing process.Protectol GA 50 has a rapid speed of kill, is costeffective and easy to use. In paper processing,the principal benefit of Protectol GA 50 is that itcan be used as a stand-alone product.

QUALITYProtectol GA 50 is a clear, colourless solutioncontaining an active content of 50%Glutaraldehyde in water.

Protectol GA 50 is classed as an aldehyde which iseffective against Gram positive and Gram negativebacteria and fungi.

Protectol GA 24 is a clear, colourless solutioncontaining an active content of 24%Glutaraldehyde in water.

Both products have a shelf life of at least six months.

ANTIMICROBIAL ACTIVITYProtectol GA 50 is extremely effective againstslime forming bacteria such as Pseudomonasaeruginosa, Staphylococcus aureus, Escherichiacoli and Micrococcus spp found in fouled paper-making systems. The ability of Protectol GA 50 torapidly reduce the level of micro-organismspresent in a typical paper making process isexcellent.

M.I.C. data on Protectol GA 50 has beengenerated using in-house methodology. It shouldbe noted that due to the influence of mediaconstituents, the M.I.C. results are generallyhigher than the effective doses required in-use.



Protectol GA 50 is soluble in water and a range ofpolar organic solvents. This facilitates use in thevast majority of water-based systems and ensuresthat it can exert maximum effect at the site ofcontamination in the paper process. Stability isreduced above pH7 and at elevated temperatures(>40˚C).

Protectol GA 50 is compatible with a range ofmaterials used in the paper and pulp industry suchas retention aids, flocculants and other biocides. Incommon with other non-oxidising biocides, strongreducing and oxidising agents should be avoided.


Paper Mill Process Water

Protectol GA 50 can be dosed at a convenientpoint early in the process, but experience hasshown that the best results are achieved byadding it to the wet end of the machine, wheregood dispersion can take place. Convenientlocations for this are the machine chest, constanthead box, machine wire pit or backwater loopsystem. The levels of Protectol GA 50 requireddepend on the cleanliness of the system, thequality of the raw materials and the degree ofmicrobial control required. A typical regime mayinvolve initially dosing at a level of 200 - 400g ofProtectol GA 50 per tonne of finished paper.


Staphylococcus spp. 50

Bacillus spp. 1250

Desulphovibrio spp. 60

Pseudomonas spp. 150 - 250

Candida spp. 1250

Aspergillus spp. 475

Bulk Pulp

Protectol GA 50 can be used to preserve bulkpulp and control both foul odours and generalbiodeterioration of stock. It may be dosed directlyinto the hydropulper, machine chest or stockchest. A single slug dose of between 100ppm and500ppm is sufficient to provide control in thestock. In situations where contamination is high,repeat dosing every 1 - 7 days may be required.

Paper Mill Additives

To inhibit the growth of spoilage bacteria duringthe manufacture of water-based solutions,suspension concentrates and emulsions, ProtectolGA 50 may be dosed at 100-500ppm based onfinal formulation volume.


In order to support the safe use of Glutaraldelyde,a wide range of toxicological studies has beencarried out. The extensive nature of this databaseis particularly helpful in supporting productregistrations and answering any concerns onproduct safety. Protectol GA 50 is toxic ifswallowed or inhaled and is corrosive to the skinand eyes. It may cause skin sensitation and hasbeen classed as a respiratory sensitiser in the EU.Protectol GA 50 is not teratogenic or carcinogenicand is not mutagenic in animal studies.

Protectol GA 50 is readily biodegradable in theenvironment and should not cause problems insewage treatment plants and surface waters whenused as recommended.

REGISTRATIONSNORTH AMERICA

USAEPA - BASF’s Glutaraldehyde is approved for use as a paperslimicide.

FDA 21, CFR - Code of Federal Regulations. Listings are:

173.320 - Chemicals for controlling microorganisms in cane-sugarand beet-sugar mills.176.170 - Components of paper and paperboard in contact withaqueous and fatty food.176.180 - Components of paper and paperboard in contact withdry food.176.300 - Paper slimicide use.

CANADABASF’s Glutaraldehyde is registered as a technical product foruse in manufacturing registered microbiocides.

EUROPE (EU)

GERMANYBgVV - Recommendations for food-contact applications.XXXVI, B VII - Paper and board, slimicides.XXXVI/2, IIG - Paper and board for bakeries, slimicides.

FINLANDProtectol GA 50 and GA 24 are approved for use in paperslimicides.

SWEDENProtectol GA 50 is approved for use as a paper slimicide.

P A G E 1 1

P A G E 1 2

Protectol® DZ / Protectol® DZ PBiocide

Protectol DZ biocide is the trade name forDazomet, a heterocyclic compound. Within thepulp and paper industry it is used both as apreservative for mill additives and as an activeslimicide to control growth in the process water. Itboasts excellent antimicrobial activity. ProtectolDZ is particularly active against slime-formingorganisms and sulphate reducing bacteria, whichcan be responsible for corrosion.

The most important benefits of Dazomet in thepulp and paper industry are its rapid speed of killand broad spectrum activity.

QUALITY Protectol DZ is a fine granular grade product andProtectol DZ P is a powder form. Both productsare off-white in colour and contain a minimum of99 % Tetrahydro-3,5-dimethyl-2H-1,3,5-thiadiazine-2-thione.

BASF’s Dazomet has a shelf life of at least 2 years.It should not be stored at temperatures above 40˚C.

ANTIMICROBIAL ACTIVITYDazomet is extremely effective against slime-forming and spoilage organisms such asPseudomonas spp., Klebsiella spp.,Staphylococcus aureus, Aspergillus niger andCandida albicans. The Minimum InhibitoryConcentrations (M.I.C.) of Dazomet are displayedin the following table:




Dazomet has a relatively low water solubility (max0. 3% w/w) but is sufficiently soluble to acteffectively in water-based systems. The solubility ofthe active may be increased by the use of organicsolvents (e.g. Dimethylformamide, N-Methylpyrrolidone) or by formation of sodiumsalts at high pH. Solutions of >20% w/w arepossible in 10% NaOH. It is also possible toformulate suspension concentrates containing30% active ingredient.

Dazomet is compatible with a wide range ofadditives used in the paper processing industryincluding flocculants, retention aids, dispersantsand mineral slurries.


Protectol DZ is very active at low doses in paperindustry biocide applications. For use as aslimicide it should be dosed at 50g to 150g pertonne of finished paper. As a preservative for bulkpulp and paper mill auxiliaries (e.g. mineralslurries) 100-500ppm Protectol DZ isrecommended.


Protectol DZ has an extensive toxicity datapackage due to its use in the agricultural industry.As supplied, Protectol DZ has a moderate acuteoral toxicity and is an eye irritant but is neitherirritant nor senitising to the skin. Protectol DZ isalso not carcinogenic, mutagenic or teratogenic.

Protectol DZ is ultimately biodegradable in theenvironment and should not cause problems insewage treatment plants and surface waters whenused as directed.

REGISTRATIONSNORTH AMERICA

USA

EPA - BASF’s Dazomet is approved for the manufacture of

antimicrobial products. It also has end use approvals for paper

slimicide applications and mill additive preservation.

FDA 21 CFR - Code of Federal Regulations. Listings are:

176.170 Components of paper and paperboard in contact with

aqueous and fatty food.

Test Organisms M.I.C. (ppm)20oC 40oC

Staphylococcus aureus 500 3.9

Escherichia coli 500 62.5

Proteus mirabilis 250 15.6

Pseudomonas aeruginosa 250 31.3

Candida albicans 500 7.8

176.180 Components of paper and paperboard in contact with

dry food.

176.230 Preservative used in paper coatings for use in contact

with food.

176.300 Paper slimicide use.

CANADA

BASF’s Dazomet is approved by Health Canada for the

manufacture of formulated products.

EUROPE (EU)

GERMANYBgVV recommendations for food-contact applications.

XIV, 2f - Substances added to dispersions to prevent microbialattack.

XXXVI, B VII Paper and board, slimicides.

XXXVI/2, IIG - Paper and board for bakery applications, slimicides.

FINLANDProducts based on Tetrahydro-3,5-dimethyl-2H-1,3,5-thiadiazine-2-thione are provisionally approved for use asslimicides in papermaking.

Dazomet is on the chemical register of Japan (MITI), Australia(AICS), Korea and Philippines.

P A G E 1 3

P A G E 1 4

Protectol® HTBiocide

Protectol HT biocide is a 76% solution ofHexahydrotriazine, a formaldehyde-release biocideand is particularly suitable for use as a preservativein mineral slurries. It can be used as a stand-alonepreservative or in conjunction with other biocides.Protectol HT is a premium quality Triazine, due toits purity, odour, stability and colour.

QUALITYProtectol HT is supplied as a 76% solution of1,3,5-Tris-(2-hydroxyethyl)-1,3,5-hexahydrotriazine. It is a clear, colourless toslightly yellowish solution.

As a concentrate, Protectol HT is stable for up to12 months when stored in sealed containers attemperatures up to 30˚C.

ANTIMICROBIAL ACTIVITYThe spoilage of mineral slurries, coatings andother additives is generally due to a mixedpopulation of bacteria. The main types ofmicroorganism found in slurries include species ofthe following genera: Pseudomonas, Alcaligenes,Aeromonas, Bacillus, Klebsiella, Serratia andErwinia. The Minimum Inhibitory Concentration(M.I.C.) against a range of test organisms aredisplayed in the following table:




Protectol HT is soluble or miscible with water,alcohols, glycols and other polar organic solvents.This facilitates use in the pulp and paper industry.

Protectol HT works well as a preservative in kaolinand calcium carbonate slurries.

The widespread use of Protectol HT in preservationapplication areas suggests that it is compatiblewith a broad range of materials including mineralslurries and paper coating components.


To inhibit the growth of spoilage bacteria duringthe manufacture, storage and distribution of water-based solutions, suspension concentrates andemulsions, Protectol HT may be dosed at between250 - 1000ppm based on final formulation volume.

CASE STUDYAn in-house study was conducted to demonstratethe efficacy of Protectol HT in the preservation ofcalcium carbonate slurries. The procedure usedwas the ASTM: E723-91 Standard Test Method forefficacy of antimicrobials as preservatives foraqueous-based products. The pH of calciumcarbonate clay slurry is normally between 9.0 -10.0. In this study, Protectol HT provided longterm preservation by reducing contamination to<10cfu within 24 hours and controlled microbialgrowth for at least 6 weeks. As a result of thesestudies, it is recommended that Protectol HT canbe used for the preservation of calcium carbonateclay slurries at concentrations between 250 and1000ppm.

SAFETY CHARACTERISTICSAs a concentrate, Protectol HT has moderateacute oral toxicity and is an eye irritant. It maycause skin sensitation but it is not mutagenic.

Protectol HT is readily biodegradable in theenvironment and should not cause problems insewage treatment plants and surface water whenused as recommended.

REGISTRATIONS

USATSCA listed.

JAPANMITI listed.


Staphylococcus aureus 1000

Escherichia coli 1000

Proteus mirabilis 1000

Pseudomonas aeruginosa 1000

Candida albicans 2500

The information submitted in this publication isbased on our current knowledge and experience.In view of the many factors that may affectprocessing and application, this data does notrelieve processors of the responsibility of carryingout their own tests and experiments; neither dothey imply any legally binding assurance ofcertain properties or of suitability for a specificpurpose. It is the responsibility of those to whomwe supply our products to ensure that anyproprietary rights and existing laws and legislationare observed.

P A G E 1 5

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BASF Belgium S.A.

Specialty Chemicals

B-1180 Bruxelles / Brussel

Fax: +32 (0) 2 373 7055

BASF AktiengesellschaftSpecialty Chemicals

D-67056 Ludwigshafen

Fax: +49 (0) 621 60 93 937

BASF MicroCheck LimitedRuddington Fields Business Park,

Mere Way, Ruddington, Nottingham,

NG11 6JS, England

Telephone: +44 (0)115 912 4586

Fax: +44 (0)115 912 4592

e-mail: [email protected]

www.basfbiocides.com

BASF Espanola S.A.

Specialty Chemicals

E-08080 Barcelona

Fax: +34 (0) 93 488 30 16

BASF AB

Specialty Chemicals Nordic

S-41314 Göteborg

Fax: +46 (0) 31 639 900

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7 Temasek Boulevard

30-01 Suntec Tower One

Singapore 038987

Fax: +65 (0) 432 36 93

BASF plc

Specialty Chemicals

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Specialty Chemicals

09851-550 S~ao Bernardo do Campo - SP

Brazil

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BASF Aktiengesellschaft

Specialty Chemicals

D-60551 Frankfurt

Fax: +49 (0) 69 633 08 121

BASF Corporation3000 Continental Drive-North

Mount Olive, NJ 07828-1234

www.basf.com

For technical service,

Call (800) 294 6750

Or fax (847) 244 9633

For customer service,

Call (800) 443 6460

Or fax (973) 426 4906

BASF Canada Inc.

345 Carlingview Drive, Toronto,

Ontario M9W 6N9

Fax: +1 416 764 2588

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Paper Industry Biocides