We unleash your business potential by maximize the business innovation.
Send EmailStandard Chinese Rubber, Technically Specified Rubber, TSR, SCR, SCR 5, SCR 10, SCR 20, 9006-04-6
Standard Chinese Rubber / SCR / SCR 5 / SCR 10 / SCR 20 / Technically Specified Rubber / TSR
CAS Number: 9006-04-6
EINECS: 232-674-7
| Parameter | Description |
|---|---|
| Product Name | Standard Chinese Rubber (SCR) |
| Other Names | SCR, Technically Specified Rubber (TSR), Natural Rubber (NR), Chinese 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 | GB/T 8081 (Chinese Standard for Technically Specified Rubber) |
Standard Chinese Rubber (SCR) is a technically specified natural rubber (TSR) produced in China according to Chinese Standard GB/T 8081, which is aligned with international standards (ISO 2000:2014). China is one of the world's largest consumers of natural rubber and has significant domestic production, primarily in Hainan, Yunnan, and Guangdong provinces. SCR grades are classified based on technical specifications including dirt content, ash content, nitrogen content, volatile matter, and Mooney viscosity. The grading system follows the TSR (Technically Specified Rubber) convention. The main SCR grades are SCR 5 (premium grade), SCR 10 (medium grade), and SCR 20 (economic grade). SCR grades are comparable to STR 5/10/20, SMR 5/10/20, SVR 3L/10/20, and SIR 5/10/20 grades from other producing countries.
| Grade | Quality Level | Dirt Content (max) | Ash Content (max) | Nitrogen Content (max) | Volatile Matter (max) | Mooney Viscosity | Primary Applications |
|---|---|---|---|---|---|---|---|
| SCR 5 | Premium Grade | 0.05% | 0.75% | 0.60% | 0.80% | 65 ± 5 | High-performance tires, specialty industrial rubber products |
| SCR 10 | Medium Grade | 0.10% | 1.00% | 0.60% | 0.80% | 60 ± 5 | Automotive tires, general industrial rubber products |
| SCR 20 | Economic Grade | 0.20% | 1.00% | 0.60% | 0.80% | 55 ± 5 | General-purpose tires, low-cost rubber products |
Grade Definitions:
SCR 5 (Premium Grade): Highest quality grade with very low dirt content (0.05%) and low ash content (0.75%). Used in high-performance tires, specialty industrial rubber products, and applications requiring high purity and consistency. Mooney viscosity is 65 ± 5. Light brown in color.
SCR 10 (Medium Grade): Medium quality grade with dirt content (0.10%) and ash content (1.00%). Used in automotive tires, general industrial rubber products, and applications where a balance of quality and cost is required. Mooney viscosity is 60 ± 5. Medium brown in color.
SCR 20 (Economic Grade): Economic quality grade with higher dirt (0.20%) and ash (1.00%) content. Most cost-effective grade. Used in general-purpose tires and low-cost rubber products where cost is the primary consideration. Mooney viscosity is 55 ± 5. Darker brown in color.
Detailed Quality Parameters by Grade:
| Parameter | Unit | SCR 5 | SCR 10 | SCR 20 |
|---|---|---|---|---|
| Dirt Content (max) | % wt | 0.05 | 0.10 | 0.20 |
| Ash Content (max) | % wt | 0.75 | 1.00 | 1.00 |
| Nitrogen Content (max) | % wt | 0.60 | 0.60 | 0.60 |
| Volatile Matter (max) | % wt | 0.80 | 0.80 | 0.80 |
| Mooney Viscosity (ML 1+4 at 100°C) | MU | 65 ± 5 | 60 ± 5 | 55 ± 5 |
| Color | - | Light brown | Medium brown | Darker brown |
| Packaging | - | Pressed bales, 33.33 kg | 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. SCR 5 has the lowest dirt content (0.05%), SCR 10 has medium dirt content (0.10%), and SCR 20 has higher dirt content (0.20%).
Ash Content: Inorganic residue after combustion. Indicates mineral contamination. SCR 5 has lower ash content (0.75%) compared to SCR 10 and SCR 20 (1.00%).
Nitrogen Content: Protein content indicator. All grades have a maximum of 0.60%.
Volatile Matter: Moisture and volatiles. High levels can cause porosity in finished products. All grades have a maximum of 0.80%.
Mooney Viscosity: Resistance to flow. SCR 5 has higher viscosity (65 ± 5) indicating higher molecular weight and better mechanical properties. SCR 10 has medium viscosity (60 ± 5). SCR 20 has lower viscosity (55 ± 5).
| Property | SCR 5 | SCR 10 | SCR 20 |
|---|---|---|---|
| Quality Level | Premium | Medium | Economic |
| Dirt Content | Very Low (0.05%) | Low (0.10%) | Higher (0.20%) |
| Ash Content | Low (0.75%) | Medium (1.00%) | Medium (1.00%) |
| Mooney Viscosity | 65 ± 5 | 60 ± 5 | 55 ± 5 |
| Color | Light brown | Medium brown | Darker brown |
| Price | Highest | Moderate | Lowest |
| Primary Applications | High-performance tires, specialty products | Automotive tires, general industrial products | General-purpose tires, low-cost products |
| Grade | Origin | Characteristics | Equivalence |
|---|---|---|---|
| SCR 5 | China | Premium quality | Comparable to STR 5 / SMR 5 / SVR 3L / SIR 5 |
| SCR 10 | China | Medium quality | Comparable to STR 10 / SMR 10 / SVR 10 / SIR 10 |
| SCR 20 | China | Economic quality | Comparable to STR 20 / SMR 20 / SVR 20 / SIR 20 |
| STR 5 | Thailand | Premium quality | Comparable to SCR 5 |
| SMR 5 | Malaysia | Premium quality | Comparable to SCR 5 |
| SVR 3L | Vietnam | Premium quality | Comparable to SCR 5 |
| SIR 5 | Indonesia | Premium quality | Comparable to SCR 5 |
TSR Naming Convention: The letters indicate country of origin (SCR = China, 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) | 50-70 MU (grade dependent) |
| Color | Light brown (SCR 5) to darker brown (SCR 20) |
| Service Temperature Range | -50°C to +100°C |
| Application | Recommended Grade |
|---|---|
| High-Performance Tires | SCR 5 |
| Automotive Tires - Passenger | SCR 10 |
| Automotive Tires - Truck and Bus | SCR 10 |
| General-Purpose Tires | SCR 20 |
| OTR (Mining/Construction) Tires | SCR 20 |
| Retreading | SCR 5, SCR 10 |
| Application | Recommended Grade |
|---|---|
| Specialty Industrial Rubber Products | SCR 5 |
| Automotive Seals and Gaskets | SCR 5, SCR 10 |
| Hoses and Tubing | SCR 10, SCR 20 |
| Conveyor Belts | SCR 10 |
| V-Belts and Drive Belts | SCR 5, SCR 10 |
| Anti-Vibration Mounts | SCR 10 |
| Rubber Rollers | SCR 5 |
| Application | Recommended Grade |
|---|---|
| Shoe Soles | SCR 10 |
| Industrial Footwear | SCR 10, SCR 20 |
| Rubber Mats | SCR 20 |
| Rubber Bands | SCR 10 |
| Toys | SCR 10, SCR 20 |
| Application | Recommended Grade |
|---|---|
| Light-colored Rubber Products | SCR 5 |
| Medical Rubber Products | SCR 5 |
| Adhesive Tapes | SCR 5, SCR 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) |
| Chinese Standard | GB/T 8081 |
| Category | Names / Identifiers |
|---|---|
| Product Names | Standard Chinese Rubber, SCR, Chinese Rubber, Natural Rubber |
| Grade Names | SCR 5, SCR 10, SCR 20 |
| Common Names | TSR (Technically Specified Rubber), NR |
| Country Equivalents | SCR (China), 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 |
|---|---|
| SCR 5 | 4001.2210 / 4001.2220 |
| SCR 10 | 4001.2210 / 4001.2220 |
| SCR 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 |
|---|---|
| High-performance tires, specialty products | SCR 5 |
| Automotive tires, general industrial products | SCR 10 |
| General-purpose tires, low-cost products | SCR 20 |
| Light-colored rubber products | SCR 5 |
| Medical rubber products | SCR 5 |
| Industrial rubber products | SCR 10 |
| Industry | Applications | Recommended Grade | Suitability |
|---|---|---|---|
| Tire Industry | High-performance tires | SCR 5 | High |
| Tire Industry | Automotive, general-purpose tires | SCR 10, SCR 20 | High |
| Industrial Products | Specialty products, seals, hoses | SCR 5, SCR 10 | High |
| Footwear | Shoe soles | SCR 10, SCR 20 | High |
| Medical | Medical rubber products | SCR 5 | High |
| Consumer | Mats, toys, rubber bands | SCR 10, SCR 20 | High |
SCR is produced from natural rubber latex through a standardized process:
Latex Collection: Latex is tapped from Hevea brasiliensis trees in China (primarily Hainan, Yunnan, and Guangdong provinces).
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 (GB/T 8081).
| 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 SCR 20) | Lower grades have darker color |
| Widely accepted in domestic and international markets |
SUMMARY:
Standard Chinese Rubber (SCR) is a technically specified natural rubber produced in China according to Chinese Standard GB/T 8081, aligned with ISO 2000:2014. The main grades are SCR 5 (premium grade, dirt content 0.05%, Mooney viscosity 65 ± 5), SCR 10 (medium grade, dirt content 0.10%, Mooney viscosity 60 ± 5), and SCR 20 (economic grade, dirt content 0.20%, Mooney viscosity 55 ± 5). SCR 5 offers the highest quality and is used in high-performance tires and specialty industrial rubber products. SCR 10 is used in automotive tires and general industrial rubber products. SCR 20 is the most cost-effective grade, used in general-purpose tires and low-cost rubber products. China is one of the world's largest consumers of natural rubber and has significant domestic production, primarily in Hainan, Yunnan, and Guangdong provinces. SCR 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 China Rubber Industry Association. 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 | SCR 5, SCR 10, SCR 20 |
| Primary Use | Tires, industrial products, footwear |
Major Application Areas:
| Industry | Applications |
|---|---|
| Tire Industry | High-performance, automotive, general-purpose tires |
| Industrial Products | Specialty products, seals, hoses, conveyor belts |
| Footwear | Shoe soles |
| Medical | Medical rubber 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:
SCR grades are classified by technical specifications (GB/T 8081) rather than visual inspection, ensuring consistent quality.
SCR 5 is the highest quality grade with the lowest dirt content (0.05%) and highest Mooney viscosity (65 ± 5), used in high-performance tires and specialty products.
SCR 10 is a medium quality grade (dirt 0.10%, Mooney viscosity 60 ± 5) used in automotive tires and general industrial rubber products.
SCR 20 is the most common and cost-effective grade (dirt 0.20%, Mooney viscosity 55 ± 5), used in general-purpose tires and low-cost rubber products.
China is one of the world's largest consumers of natural rubber and has significant domestic production in Hainan, Yunnan, and Guangdong provinces.
SCR grades are comparable to STR 5/10/20, SMR 5/10/20, SVR 3L/10/20, and SIR 5/10/20 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.
SCR is certified by ISO 9001:2015 and the China Rubber Industry Association, 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.