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Send EmailIndian Standard Natural Rubber, Technically Specified Rubber, TSR, ISNR, ISNR 10, ISNR 20, 9006-04-6
Indian Standard Natural Rubber / ISNR / ISNR 10 / ISNR 20 / Technically Specified Rubber / TSR
CAS Number: 9006-04-6
EINECS: 232-674-7
| Parameter | Description |
|---|---|
| Product Name | Indian Standard Natural Rubber (ISNR) |
| Other Names | ISNR, Technically Specified Rubber (TSR), Natural Rubber (NR), Indian Rubber |
| CAS Number | 9006-04-6 |
| EINECS | 232-674-7 |
| Chemical Formula | (C₅H₈)ₙ |
| Molecular Weight | Variable (depends on degree of polymerization) |
| Chemical Class | Natural rubber (polyisoprene) |
| Appearance | Pressed bales, light to dark brown depending on grade |
| Odor | Characteristic rubber odor |
| Density | 0.92 - 0.94 g/cm³ |
| Glass Transition Temperature (Tg) | ~ -70°C |
| Standard | IS 4588 (Indian Standard for Technically Specified Rubber) |
Indian Standard Natural Rubber (ISNR) is a technically specified natural rubber (TSR) produced in India according to Indian Standard IS 4588, which is aligned with international standards (ISO 2000:2014). India is one of the world's largest producers of natural rubber, and ISNR grades are widely used in domestic and international markets. ISNR grades are classified based on technical specifications including dirt content, ash content, nitrogen content, volatile matter, plasticity, and Plasticity Retention Index (PRI). The grading system follows the TSR (Technically Specified Rubber) convention. The main ISNR grades are ISNR 10 (medium quality) and ISNR 20 (economic quality). ISNR grades are comparable to STR 10/20, SMR 10/20, SVR 10/20, and SIR 10/20 grades from other producing countries.
| Grade | Quality Level | Dirt Content (max) | Ash Content (max) | Nitrogen Content (max) | Volatile Matter (max) | Mooney Viscosity | Primary Applications |
|---|---|---|---|---|---|---|---|
| ISNR 10 | Medium Quality | 0.05% | 0.75% | 0.60% | 0.80% | 65 ± 5 | Automotive tires, industrial rubber products, high-performance applications |
| ISNR 20 | Economic Quality | 0.20% | 1.00% | 0.60% | 0.80% | 60 ± 5 | General-purpose tires, low-cost rubber products, economic applications |
Grade Definitions:
ISNR 10 (Medium Quality): Medium quality grade with low dirt content (0.05%) and low ash content (0.75%). Used in automotive tires, industrial rubber products, high-performance applications, and applications requiring a balance of quality and cost. Mooney viscosity is 65 ± 5.
ISNR 20 (Economic Quality): Economic quality grade with higher dirt (0.20%) and ash (1.00%) content. Most cost-effective grade. Used in general-purpose tires, low-cost rubber products, and applications where cost is the primary consideration. Mooney viscosity is 60 ± 5.
Detailed Quality Parameters by Grade:
| Parameter | Unit | ISNR 10 | ISNR 20 |
|---|---|---|---|
| Dirt Content (max) | % wt | 0.05 | 0.20 |
| Ash Content (max) | % wt | 0.75 | 1.00 |
| Nitrogen Content (max) | % wt | 0.60 | 0.60 |
| Volatile Matter (max) | % wt | 0.80 | 0.80 |
| Mooney Viscosity (ML 1+4 at 100°C) | MU | 65 ± 5 | 60 ± 5 |
| Color | - | Light brown | Darker brown |
| Packaging | - | Pressed bales, 33.33 kg | Pressed bales, 33.33 kg |
Explanation of Key Parameters:
Dirt Content: Impurities such as sand, bark, and foreign matter. Lower is better for premium applications. ISNR 10 has lower dirt content (0.05%) compared to ISNR 20 (0.20%).
Ash Content: Inorganic residue after combustion. Indicates mineral contamination. ISNR 10 has lower ash content (0.75%) compared to ISNR 20 (1.00%).
Nitrogen Content: Protein content indicator. Both grades have a maximum of 0.60%.
Volatile Matter: Moisture and volatiles. High levels can cause porosity in finished products. Both grades have a maximum of 0.80%.
Mooney Viscosity: Resistance to flow. ISNR 10 has higher viscosity (65 ± 5) indicating higher molecular weight and better mechanical properties. ISNR 20 has lower viscosity (60 ± 5).
| Property | ISNR 10 | ISNR 20 |
|---|---|---|
| Quality Level | Medium | Economic |
| Dirt Content | Low (0.05%) | Higher (0.20%) |
| Ash Content | Low (0.75%) | Higher (1.00%) |
| Mooney Viscosity | 65 ± 5 | 60 ± 5 |
| Color | Light brown | Darker brown |
| Price | Moderate | Lowest |
| Primary Applications | Automotive tires, industrial products | General-purpose tires, low-cost products |
| Grade | Origin | Characteristics | Equivalence |
|---|---|---|---|
| ISNR 10 | India | Medium quality | Comparable to STR 10 / SMR 10 / SVR 10 / SIR 10 |
| ISNR 20 | India | Economic quality | Comparable to STR 20 / SMR 20 / SVR 20 / SIR 20 |
| STR 10 | Thailand | Medium quality | Comparable to ISNR 10 |
| SMR 10 | Malaysia | Medium quality | Comparable to ISNR 10 |
| SVR 10 | Vietnam | Medium quality | Comparable to ISNR 10 |
| SIR 10 | Indonesia | Medium quality | Comparable to ISNR 10 |
| STR 20 | Thailand | Standard quality | Comparable to ISNR 20 |
TSR Naming Convention: The letters indicate country of origin (ISNR = India, STR = Thailand, SMR = Malaysia, SVR = Vietnam, SIR = Indonesia), and the number indicates the grade.
| Property | Value |
|---|---|
| Appearance | Pressed bales, light to dark brown |
| Odor | Characteristic rubber odor |
| Density | 0.92 - 0.94 g/cm³ |
| Glass Transition Temperature | ~ -70°C |
| Mooney Viscosity (ML 1+4 at 100°C) | 60-70 MU (grade dependent) |
| Color | Light brown (ISNR 10) to darker brown (ISNR 20) |
| Service Temperature Range | -50°C to +100°C |
| Application | Recommended Grade |
|---|---|
| Automotive Tires - Passenger | ISNR 10 |
| Automotive Tires - Truck and Bus | ISNR 10 |
| General-Purpose Tires | ISNR 20 |
| OTR (Mining/Construction) Tires | ISNR 20 |
| Retreading | ISNR 10 |
| Application | Recommended Grade |
|---|---|
| Automotive Seals and Gaskets | ISNR 10 |
| Hoses and Tubing | ISNR 10, ISNR 20 |
| Conveyor Belts | ISNR 10 |
| V-Belts and Drive Belts | ISNR 10 |
| Anti-Vibration Mounts | ISNR 10 |
| Rubber Rollers | ISNR 10 |
| Application | Recommended Grade |
|---|---|
| Shoe Soles | ISNR 10 |
| Industrial Footwear | ISNR 10, ISNR 20 |
| Rubber Mats | ISNR 20 |
| Rubber Bands | ISNR 10 |
| Toys | ISNR 10, ISNR 20 |
| Application | Recommended Grade |
|---|---|
| Light-colored Rubber Products | ISNR 10 |
| Adhesive Tapes | ISNR 10 |
| Packaging Option | Details |
|---|---|
| Bale Weight | 33.33 kg |
| Bale Dimensions | Standard block rubber dimensions |
| Pallet Configuration | 36 bales/pallet = 1.26 MT |
| Pallet Type | Wooden pallet, shrink-wrapped |
| Container Capacity (20-ft) | 16 pallets = 20.16 MT |
| Container Type | Standard 20-ft container |
| Parameter | Information |
|---|---|
| Storage Conditions | Cool, dry, well-ventilated area; away from direct sunlight |
| Recommended Temperature | Below 30°C |
| Humidity | Avoid high humidity to prevent mold growth |
| Shelf Life | 12-24 months under proper storage conditions |
| Handling | Avoid contamination with oils, solvents, and dirt |
| Protection | Keep bales covered and protected from moisture and dust |
| Stacking | Maximum 4-5 pallets high for stable storage |
| Parameter | Information |
|---|---|
| Toxicity | Non-toxic |
| Skin Irritation | Non-irritant |
| Eye Irritation | Mild irritant (dust) |
| Inhalation | May cause respiratory irritation (dust) |
| Flammability | Combustible (can burn) |
| Fire Extinguishing Media | Water spray, foam, CO₂, dry chemical powder |
| Special Hazards | Burning produces toxic fumes (CO, CO₂, SO₂) |
| Exposure Route | Action |
|---|---|
| Inhalation | Move person to fresh air. If irritation persists, seek medical attention. |
| Skin Contact | Wash with soap and water. Remove contaminated clothing. |
| Eye Contact | Rinse with plenty of water for at least 15 minutes. Seek medical attention if irritation persists. |
| Ingestion | Rinse mouth. Do NOT induce vomiting. Seek medical attention if large amounts are swallowed. |
| Region | Status |
|---|---|
| EU | REACH registered |
| Turkey (KKDİK) | Mandatory compliance; requires registration |
| USA (TSCA) | Listed |
| Canada (DSL) | Listed |
| Australia (AICS) | Listed |
| Japan (ENCS) | Listed |
| Korea (KECL) | Listed |
| China (IECSC) | Listed |
Regulatory Status:
| Status | Information |
|---|---|
| HS Code | 40012200 (Technically Specified Natural Rubber) |
| CAS Number | 9006-04-6 |
| EINECS | 232-674-7 |
| IARC Classification | Not classified |
| WGK Germany | 1 (slight hazard to water) |
| Indian Standard | IS 4588 |
| Category | Names / Identifiers |
|---|---|
| Product Names | Indian Standard Natural Rubber, ISNR, Indian Rubber, Natural Rubber |
| Grade Names | ISNR 10, ISNR 20 |
| Common Names | TSR (Technically Specified Rubber), NR |
| Country Equivalents | ISNR (India), STR (Thailand), SMR (Malaysia), SVR (Vietnam), SIR (Indonesia) |
Database Identifiers:
| Database | Identifier |
|---|---|
| CAS | 9006-04-6 |
| EINECS | 232-674-7 |
| HS Code | 40012200 |
| Grade Material | HS Code |
|---|---|
| ISNR 10 | 4001.2210 / 4001.2220 |
| ISNR 20 | 4001.2210 / 4001.2220 |
| Parameter | Test Method | Significance |
|---|---|---|
| Dirt Content | Sieve Analysis | Purity level; impacts surface finish and processing |
| Ash Content | Ignition | Inorganic contamination |
| Nitrogen Content | Kjeldahl Method | Protein content; affects aging |
| Volatile Matter | Oven Drying | Moisture content; affects processability |
| Mooney Viscosity | Mooney Viscometer | Processing consistency |
| Color | Visual Inspection | Quality indicator |
| Application | Recommended Grade |
|---|---|
| Automotive tires, high-performance products | ISNR 10 |
| General-purpose tires, low-cost products | ISNR 20 |
| Industrial rubber products | ISNR 10 |
| Light-colored rubber products | ISNR 10 |
| Footwear and consumer goods | ISNR 10, ISNR 20 |
| Industry | Applications | Recommended Grade | Suitability |
|---|---|---|---|
| Tire Industry | Automotive tires | ISNR 10 | High |
| Tire Industry | General-purpose tires | ISNR 20 | High |
| Industrial Products | Seals, hoses, conveyor belts | ISNR 10 | High |
| Footwear | Shoe soles | ISNR 10, ISNR 20 | High |
| Specialty | Light-colored products | ISNR 10 | High |
| Consumer | Mats, toys, rubber bands | ISNR 10, ISNR 20 | High |
ISNR is produced from natural rubber latex through a standardized process:
Latex Collection: Latex is tapped from Hevea brasiliensis trees in India (primarily Kerala, Tamil Nadu, and Karnataka).
Coagulation: Latex is coagulated using formic acid or acetic acid.
Milling: Coagulum is milled to remove water and impurities.
Drying: Rubber is dried in hot air ovens.
Baling: Dried rubber is compressed into bales (33.33 kg).
Grading: Bales are graded based on technical specifications (IS 4588).
| Advantages | Limitations |
|---|---|
| Technically specified (consistent quality) | Poor ozone resistance |
| Standardized specifications ensure consistency | Poor oil and fuel resistance |
| Wide range of grades for different applications | Susceptible to oxidation at high temperatures |
| Good mechanical properties | Requires proper storage to prevent mold growth |
| Competitive pricing (especially ISNR 20) | Lower grades have darker color |
| Widely accepted in domestic and international markets |
SUMMARY:
Indian Standard Natural Rubber (ISNR) is a technically specified natural rubber produced in India according to Indian Standard IS 4588, aligned with ISO 2000:2014. The main grades are ISNR 10 (medium quality, dirt content 0.05%, Mooney viscosity 65 ± 5) and ISNR 20 (economic quality, dirt content 0.20%, Mooney viscosity 60 ± 5). ISNR 10 is used in automotive tires, industrial rubber products, and high-performance applications. ISNR 20 is used in general-purpose tires, low-cost rubber products, and economic applications. India is one of the world's largest producers of natural rubber. ISNR grades are comparable to STR, SMR, SVR, and SIR grades from other producing countries. Packaging: 33.33 kg bales, 36 bales/pallet (1.26 MT), 16 pallets/20-ft container (20.16 MT). Certified by ISO 9001:2015 and the Indian Rubber Board. HS Code: 40012200.
Key Properties:
| Property | Value |
|---|---|
| Appearance | Pressed bales, light to dark brown |
| CAS Number | 9006-04-6 |
| Density | 0.92 - 0.94 g/cm³ |
| Primary Grades | ISNR 10, ISNR 20 |
| Primary Use | Tires, industrial products, footwear |
Major Application Areas:
| Industry | Applications |
|---|---|
| Tire Industry | Automotive, general-purpose tires |
| Industrial Products | Seals, hoses, conveyor belts |
| Footwear | Shoe soles |
| Specialty | Light-colored products |
| Consumer | Mats, toys, rubber bands |
Key Safety Points:
NON-TOXIC: Generally safe for handling
COMBUSTIBLE: Can burn; keep away from ignition sources
STORAGE: Store in cool, dry, well-ventilated area; avoid direct sunlight and high humidity
PPE RECOMMENDED: Dust mask, safety goggles, protective gloves (for handling)
PROTECT: Keep away from oils, solvents, and contaminants
CRITICAL WARNINGS:
ISNR grades are classified by technical specifications (IS 4588) rather than visual inspection, ensuring consistent quality.
ISNR 10 offers a balance of quality and price with low dirt (0.05%) and moderate Mooney viscosity (65 ± 5).
ISNR 20 provides cost advantage with higher dirt (0.20%) and lower Mooney viscosity (60 ± 5).
India is one of the world's largest producers of natural rubber, and ISNR grades are widely used in domestic and international markets.
ISNR grades are comparable to STR 10/20, SMR 10/20, SVR 10/20, and SIR 10/20 from other producing countries.
Store away from direct sunlight and heat sources to prevent degradation and maintain quality.
Contamination with oils or solvents can significantly affect rubber performance.
ISNR is certified by ISO 9001:2015 and the Indian Rubber Board, ensuring quality and consistency.
Important Disclaimer: This Technical Data Sheet (TDS) is for informational purposes only. The information provided is based on available data and is believed to be accurate. However, the user is solely responsible for determining the suitability of the product for their specific application and for complying with all applicable regulations and safety requirements. For complete safety, handling, storage, and regulatory compliance information, always refer to the official Safety Data Sheet (SDS/MSDS) provided by the manufacturer/supplier.