/ MATERIAL SAFTY DATA SHEET - NATURAL RUBBER
Pale crepe rubber

1. PRODUCT IDENTIFICATION

Product name: Pale crepe rubber

Product description: This is prepared by removing most of the non-rubber substances including yellow pigments by fractionation process, from natural rubber latex and then, by acid coagulation of fractionated latex. Coagulated rubber is milled into laces and then dried in warm air before making pale crepae. This is the purest form of natural rubber and the product is water white in colour.

Intended use: Raw material for dry rubber based products and adhesives

MSDS information:Rubber Research Institute of Sri Lanka

2. COMPOSITION/ INFORMATION ON INGREDIENTS

Chemical name: cis 1,4 polyisoprene

Chemical formulae: (C5H10)n

Composition:

Weight (%)

Natural rubber hydrocarbon 94-96

Non rubber substances 2-3

Foreign matter < 0.05

Extractable proteins (ASTM D 5712) <0.004

3. HAZARDS IDENTIFICATION

Health: The product contains no hazardous substances and extractable protein levels are not significant for allergic reactions

Fire:The product burns and is not inflammable. It does not emit any toxic gases on fire

Environment: The product is not considered dangerous for the environment

4. FIRST-AID MEASURES

No specific measures are needed

5. FIRE-FIGHTING MEASURES

Extinguishing media: suitable media; water spray, foam or carbon dioxide

Hazards combustion products:no hazardous products, smoke may contain carbon

monoxide.

6. ACCIDENTAL RELEASE MEASURES

No accidental release measures are required. If molten rubber contacts with skin, wash off with cool water or stream of water

7. HANDLING AND STORAGE

Handling: Avoid exposure to moisture, heat and direct UV rays as it becomes sticky. Exposure to heavy metals causes to degrade rubber faster. During processing and thermal treatment, provide adequate ventilation since small amount of volatile hydrocarbon may be released

Storage: Store in a cool and dry place with proper ventilation but no exposure to direct sun light. Avoid damp places as this absorbs moisture quickly and possibility of growing grow fungus on the rubber

8. EXPOSURE CONTROLS/ PERSONAL PROTECTION

No special exposure controls are neededfor personnel protection

9. PHYSICAL AND CHEMICAL PROPERTIES

Physical appearance: Rubbery/flexible sheets consist of several plies of laces

Colour: Water white

Odour: No odour

Solubility: Insoluble in water, soluble in aliphatic hydrocarbon solvents

Glass transition temperature (Tg): - 69 0C

Reactivity: slowly become hardening due to aldol condensation type reactions taking place during storage

Density: 0.91 g/cm3

10. STABILITY AND REACTIVITY

The product is generally stable. Oxidize at high temperature and when espouse to UV radiation. Metal ion contamination catalyses the oxidation process

11. TOXICOLOGICAL INFORMATION

This product is not considered toxic for human health.

12. ECOLOGICLAL INFORMATION

This product is considered not dangerous for the environment

13. DISPOSAL CONSIDERATIONS

Bio-degradable. Slowly degrade at environmental conditions.

14. TRANSPORT INFORMATION

Pale crepe is packed with polythene wrap or as at buyers’ request

15. REGULATORY INFORMATION

No regulatory restrictions/ Green book standards?

16. OTHER INFORMATION

This is intended for use in the manufacture of dry rubber based products, particularly tyre production. Customers should do their own testing, before using in commercial scale, to see the suitability for the intended application.