Carbon black N550's specification is defined by iodine adsorption and DBP oil absorption for reinforcing performance, alongside pH value, ash content, heating loss, individual pellet hardness, pellet fines, pour density, sieve residue, tint strength and toluene extract transmittance — each stated as a guaranteed limit in the specification table. Those figures are the published TDS limits; the Certificate of Analysis carries the measured results for each shipped batch.
Carbon black N550 is an N-series furnace black supplied by BHD, one accountable house across two divisions, built for rubber compounders who need consistent reinforcement and colour behaviour, shipment after shipment. Every order is quoted against the published specification for the grade, with volume, packaging and origin confirmed directly — no vague broker language, just spec on spec and on time.
| Property | Value | Unit | Method |
|---|---|---|---|
| Iodine Adsorption Number | 38.0 - 48.0 | mg/g | ASTM D-1510 |
| Oil Absorption Number (DBP) | 116.0 - 126.0 | cm3/100 g | ASTM D-2414 |
| Tint Strength | 58.0 - 68.0 | %IRB3 | ASTM D-3265 |
| Pelleted Pour Density | 340 - 380 | kg/m3 | ASTM D-1513 |
| Toluene Extract Transmittance | min 75.0 | % | ASTM D-1618 |
| pH Value | 7.5 - 9.0 | — | ASTM D-1512 |
| Ash Content | max 0.75 | % | ASTM D-1506 |
| Heating Loss | max 1.0 | % | ASTM D-1509 |
| Pellet Fines | max 10.0 | % | ASTM D-1508 |
| Sieve Residue | max 1000 | ppm | ASTM D-1514 |
| Individual Pellet Hardness | average 10 - 40; max 50 | cN | ASTM D-3313 |
Key characteristics
N-series furnace black formulated for consistent reinforcing performance in rubber compounds
Controlled pellet hardness for clean handling and low-dust processing
Stable tint strength batch to batch for predictable compound colour
Published specification limits, with a Certificate of Analysis for every shipment
Quietly reliable supply for tyre-rubber manufacturers who need spec on spec
Carbon Black N550 from BHD
Carbon black N550 is an N-series furnace black grade supplied by BHD. It is offered against a published Technical Data Sheet (TDS) — a specification sheet naming the guaranteed limits for the grade, not a per-batch test report.
Documentation on every shipment
Every shipment travels with a Certificate of Analysis (CoA), the document carrying the measured, per-batch values against those TDS limits. Procurement teams work from the guaranteed specification at quotation and the tested numbers for their own batch at delivery.
Ordering carbon black N550
Volume, packaging and lead time are confirmed directly at quotation. Grade, origin and CoA are settled before any shipment moves — dependable by nature, not by promise.
Carbon Black
CoA supplied per shipment.
Frequently asked questions
Does every shipment of carbon black N550 come with test data?
Yes. Each shipment ships with a Certificate of Analysis (CoA) stating the measured values for that batch against the published TDS specification limits.
What is the difference between the TDS and the CoA?
The TDS is the published specification sheet naming the guaranteed limits for carbon black N550. The CoA is the per-batch document carrying the measured values, and it accompanies every shipment.
Is there a minimum order quantity for carbon black N550?
Order volumes are confirmed directly at quotation. Reach out with the grade and volume you need and we will confirm what applies to your order.
What packaging and lead times are available?
Packaging and lead time are confirmed at quotation, based on the volume required and your delivery destination.
Where is carbon black N550 sourced from?
Origin is confirmed at quotation and stated on the Certificate of Analysis (CoA) that accompanies your shipment.
If the grade you need is not listed here, tell us the specification and volume and BHD Sourcing will find it — request a quote.
Why buyers work with BHD Group
Two divisions operate under a single accountable house. There is no handoff between a trading desk and a sourcing desk that leaves a buyer chasing an answer — one team owns the order from enquiry to delivery.
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