Polymers & Resins
REACH
Natural rubber
CAS Number
9006-04-6
EC Number
232-689-0
What is Natural rubber?
Natural rubber (CAS 9006-04-6), also traded as para rubber and India-rubber, is an elastomer harvested from Hevea brasiliensis and processed into industrial polymer form.
Where is Natural rubber used?
- Tires: compounded into truck, aircraft and off-road formulations where heat buildup resistance and load-bearing performance are critical for safety and durability
- Automotive: seals, bushings and anti-vibration mounts that absorb mechanical shock
- Aerospace: aircraft landing gear components and flexible ducting
- Industrial: conveyor belts, hoses and gaskets for cut resistance and long service life
- Latex concentrate serves dipping, coating and adhesive manufacturing.
Good to know: Standard international grading follows ASTM D2227 and ISO 2000, with TSR 20 and TSR 10 the most commonly traded industrial grades.
Commercial specifications
- Solid forms: ribbed smoked sheets (RSS), technically specified rubber (TSR/SVR grades), crepe rubber
- Latex concentrate available separately
Other Names (Synonyms)
para rubber|latex rubber|India-rubber|gum elastic|rubber|ISOPRENE|2-Methyl-1,3-butadiene|2-Methylbuta-1,3-diene
What are the physical properties of Natural rubber?
Density 0.906-0.916 g/cm³ @ Temp: 20 °C
Appearance High tensile strength; relatively low per- manent set; insensitive to temperature changes. Attacked by heat, atmospheric oxygen, ozone, hydrocarbons, and unsaturated fats and oils. Insol- uble in acetone. Permeable to gases; supports combustion; abrasion resistance poor unless com- pounded with carbon black; dissipates vibration shock; high electrical resistivity.
Form milky fluid; solid.
How is Natural rubber classified and handled safely? Learn More
Danger
GHS02· Flammable GHS08· Health Hazard GHS07· Irritant GHS09· Environmental Hazard
Hazard Statements
H224 Extremely flammable liquid and vapor [Danger Flammable liquids]
H341 Suspected of causing genetic defects [Warning Germ cell mutagenicity]
H350 May cause cancer [Danger Carcinogenicity]
H412 Harmful to aquatic life with long lasting effects [Hazardous to the aquatic environment, long-term hazard]