Tires
Choosing carbon black for tires means choosing a structural component, not a filler. Tread…
N121 Carbon Black Hard grade Origin: Iran
N121 Carbon Black
N121 carbon black combines high structure with outstanding reinforcement. It is the grade with the highest abrasion resistance in the range, made for the most demanding mechanical performance requirements.
- HS Code
- 2803.00
- Minimum order
- 1 pallet
- Delivery terms
- EXW · FOB · CFR · CIF · DDP
N121 carbon black is the most aggressive reinforcing grade in the catalog: an iodine adsorption of 121 g/kg, an oil absorption of 132 ml/100 g and a nitrogen surface area of 122 m²/g. Together, these values deliver the highest achievable abrasion resistance.
Where it is needed
Off-the-road tires on mining, construction and agricultural machinery run on sharp stone and rock; here, resistance to cutting and chipping matters more than wear. N121 is designed for these conditions.
Processing note
The combination of high structure and high surface area markedly raises compound viscosity. Mixing temperature, mixing time and the order of oil addition should be specifically optimized for this grade.
Applications
Off-the-road tire treads, tire tread layers, conveyor belts and other industrial rubber products that require high strength.
Technical Specifications
| # | Property | Value | Unit |
|---|---|---|---|
| 01 | Iodine adsorption number ASTM D1510 | 121 ± 5 | g/kg |
| 02 | Oil absorption number (OAN) ASTM D2414 | 132 ± 5 | ml/100 g |
| 03 | Compressed oil absorption number (COAN) ASTM D3493 | 111 ± 5 | ml/100 g |
| 04 | Pour density ASTM D1513 | 320 ± 20 | kg/m³ |
| 05 | Heating loss (max) ASTM D1509 | 1 | % |
| 06 | Toluene discoloration (min) ASTM D1618 | 85 | % |
| 07 | pH ASTM D1512 | 7.5 – 9 | |
| 08 | Fines content — Q-Bag (max) ASTM D1508 | 7 | % |
| 09 | Fines content — bag (max) ASTM D1508 | 10 | % |
| 10 | Individual pellet hardness — single max (20 pellets) ASTM D5230 | 50 | cN |
| 11 | Individual pellet hardness — average (20 pellets) ASTM D5230 | 10 – 40 | cN |
| 12 | Sieve residue — No. 35 US Std (max) ASTM D1514 | 10 | ppm |
| 13 | Sieve residue — No. 325 US Std (max) ASTM D1514 | 1,000 | ppm |
| 14 | Ash content (max) ASTM D1506 | 0.75 | % |
| 15 | Sulfur content (max) ASTM D1619 | 2 | % |
| 16 | Nitrogen surface area (NSA) ASTM D6556 | 122 ± 5 | m²/g |
| 17 | External surface area (STSA) ASTM D6556 | 114 ± 5 | m²/g |
| 18 | Tint strength ASTM D3256 | 119 ± 5 | % |
Values are manufacturer specifications; ± indicates the production tolerance. Every shipment is sent with a certificate of analysis (CoA) for that batch from an ISO/IEC 17025 accredited laboratory.
Packaging and Loading
| Packaging Type | Net Weight | Per Pallet | Container / Truck |
|---|---|---|---|
| Jumbo bag (PP-PE, double valve) | 1,000 kg | 1,000 kg | 20' FCL 10 pallets / 10,000 kg · 40' FCL 20 pallets / 20,000 kg · Truck 22 pallets / 22,000 kg |
Certificates
Technical Data Sheet (TDS)Available on request
Safety Data Sheet (SDS)Available on request
- ISO 9001
- ISO 14001
- ISO 45001
- ISO/IEC 17025
Key Features
- High structure and outstanding reinforcement — OAN 132 ml/100 g: the highest structure in the range.
- Maximum abrasion resistance — Longest service life in off-the-road and heavy-duty tires.
- Very high tensile and tear strength — Cut resistance on stone and sharp surfaces.
- For high mechanical performance compounds — Chosen when demands are highest.
Industries Served
Industrial Rubber
Carbon black for rubber products beyond tires: conveyor belts, hoses, seals, diaphragms…
Similar Grades
Trial program
How does it work?
1-pallet trial offer
Test the product and return it if you are not satisfied. No obligation.
Frequently Asked Questions About This Product
Why does N121 give the highest abrasion resistance?
An iodine adsorption of 121 g/kg, an oil absorption of 132 ml/100 g and a nitrogen surface area of 122 m²/g together produce the highest achievable reinforcement in the range.
Should I change my mixing settings when using N121?
Yes. The combination of high structure and high surface area markedly raises compound viscosity. Mixing temperature, mixing time and the order of oil addition should be specifically optimized for this grade.
What packaging is N121 available in?
N121 is supplied in 1,000 kg double-valve PP-PE jumbo bags. A 20' container takes 10 pallets (10,000 kg), a 40' container 20 pallets (20,000 kg) and a truck 22 pallets (22,000 kg). If you need kraft paper bags, send us your request and we will check availability.
Does N121 come with a certificate of analysis and a safety data sheet?
Yes. Every shipment is sent with a certificate of analysis (CoA) for that batch, issued by an ISO/IEC 17025 accredited laboratory. We send the safety data sheet (SDS) on request; if you would like to see a sample report before ordering, you can ask for one through the quote form.