BHD Group supplies N-series carbon black (N220 through N660, plus P-8201) and base oil SN 500 to rubber plants making tyres, hoses and technical rubber goods. Grade classification follows ASTM D1765, and base oil interchange follows API 1509 Annex E — the two references rubber plant buyers use to check what they are ordering.
An n-series carbon black and base oil SN 500 supplier for rubber plants provides reinforcing filler grades (N220, N234, N326, N330, N339, N375, N550, N660, P-8201) and a Group I base oil (SN 500) used together in rubber compounding — carbon black to reinforce the polymer, base oil to process and extend it. BHD Group supplies both product lines from its Chemical division, alongside carbon black's confirmed role in tyre manufacture.
Who this guide is for
This page is written for three buyers inside a rubber plant. A compounding engineer needs to match a carbon black grade to a cure profile. A procurement lead needs to specify a base oil that a supplier can interchange without disrupting a formulation. A quality manager needs to know which standards and restrictions apply before goods clear the gate. Each gets a dedicated answer below.
What is N-series carbon black?
N-series is the standard nomenclature for rubber-grade carbon black. According to ASTM International (undated), ASTM D1765 "covers the classification of rubber-grade carbon blacks by the use of a four-character nomenclature system," and the first character indicates the black's influence on the cure rate of a typical rubber compound. That is why a compounding engineer reads "N2" as fast-curing and "N5" or "N6" as slower-curing before looking at particle size at all.
Why carbon black is in the formulation at all
Carbon black is not a filler added for bulk. According to Polymers, MDPI (2021), adding carbon black particles to elastomeric polymers is essential to the successful industrial use of rubber in many applications, and the reinforcing effect has been studied for close to 100 years. Separately, C. M. Roland, US Naval Research Laboratory (2016), describes carbon black as the pre-eminent reinforcing filler for rubber, with over 40 grades available, built from colloidal aggregates of many primary particles. The N-series grades BHD supplies — N220 through N660, and P-8201 — sit inside that wider family.
Where N-series carbon black is used
The carbon-black family is used to make vehicle tyres, serving the tyre-rubber industry. That is the confirmed application a rubber plant buyer is checking this page for: reinforcing filler for tyre compounds, from tread to sidewall to carcass, depending on grade.
What is base oil SN 500, and how does it fit rubber processing?
SN 500 is a Group I solvent-neutral base oil, used in rubber compounding as a processing and extender oil alongside carbon black. Base oil interchange is governed by industry guidelines rather than a fixed one-to-one substitution. According to American Petroleum Institute (undated), API 1509 Annex E sets out base oil interchangeability guidelines, illustrated by an example in which a marketer replaces the Group I 200N base stock in SAE 5W-30 and 10W- engine oils. A rubber plant applying an interchange to a process oil should work from the same discipline: confirm the base oil group and viscosity grade before substituting one supply lot for another.
How does an N-series and base oil supply relationship work?
In practice, a rubber plant orders carbon black grades against a fixed compounding recipe and orders base oil SN 500 as a companion processing aid. The supplier's job is consistency: the same grade, batch after batch, with documentation a quality manager can file against ASTM D1765 and any applicable REACH restriction. BHD Group's role as supplier sits on that operational layer — sourcing and dispatch on spec, not reformulation.
Regulatory checks a rubber plant should not skip
PAH restriction under REACH
Carbon black and process oils used in rubber compounds fall inside a specific EU restriction. According to European Chemicals Agency (undated), the REACH Annex XVII entry 50 PAH restriction "applies to rubber and plastic components"; other materials fall outside its scope. A rubber plant compounding tyre or technical rubber goods for the EU market should confirm PAH content is covered in supplier documentation before the material reaches the line.
The limits themselves are set out separately. According to the European Commission Joint Research Centre (undated), Regulation (EU) 1272/2013 sets content limits for eight PAHs of 0.5 mg/kg in plastic and rubber components of toys and childcare articles, and 1 mg/kg for all other consumer articles. Buyers making rubber goods for either category should ask their supplier which limit applies to their end product.
National variations under REACH Article 67(3)
Some EU countries ran stricter national rules before EU-wide harmonisation. According to the European Commission — DG GROW (undated), Article 67(3) of REACH allowed an EU country to maintain, until 1 June 2013, existing more stringent restrictions relating to Annex XVII on the manufacture, placing on the market or use of a substance. A procurement lead selling finished rubber goods into multiple EU markets should confirm current national status rather than assume Annex XVII alone is the full picture.
How carbon black itself is manufactured
Manufacturing process is background a quality manager may be asked about by their own customers. According to the US Environmental Protection Agency (1995), of the two processes used in the United States to manufacture carbon black, "the oil furnace process accounts for about 90 percent of production, and the thermal, about 10 percent." Separately, the US Environmental Protection Agency (undated) notes that carbon black production is regulated as an area source category covering furnace black, thermal black, and acetylene decomposition processes at an emissions rate of 10 tons per year for one pollutant.
Standards a buyer should recognize at a glance
| Reference | What it covers | Why a rubber plant buyer checks it |
|---|---|---|
| ASTM D1765 | Four-character nomenclature for rubber-grade carbon black classification | Confirms the grade name (e.g. N330) maps to the correct cure-rate category before ordering |
| API 1509 Annex E | Base oil interchangeability guidelines | Governs whether one base oil lot can replace another without reformulating |
| REACH Annex XVII, entry 50 | PAH restriction on rubber and plastic components | Determines whether PAH documentation is required for the finished rubber good |
| Regulation (EU) 1272/2013 | PAH content limits (0.5 mg/kg toys/childcare; 1 mg/kg other consumer articles) | Sets the numeric limit a compounded rubber good must meet for its category |
What to check before you order
- Confirm the exact N-series grade (N220, N234, N326, N330, N339, N375, N550, N660, or P-8201) against your compound's cure-rate requirement, per ASTM D1765 nomenclature.
- Confirm SN 500 is specified by base oil group and viscosity grade, not by brand name alone.
- Ask whether any proposed base oil interchange has been checked against API 1509 Annex E guidelines.
- Request PAH documentation if the finished rubber good is a plastic or rubber component under REACH Annex XVII entry 50.
- Confirm which PAH limit applies to your end product — 0.5 mg/kg for toys and childcare articles, 1 mg/kg for other consumer articles, under Regulation (EU) 1272/2013.
- Check current national restrictions in your destination EU market, in case Article 67(3) variations still apply.
- Confirm lot-to-lot consistency terms and documentation with your supplier before the first shipment, not after.
- Verify the carbon-black and base-oil confirmed application matches your own end use — tyre and rubber manufacture — before treating other uses as covered.
Working with BHD Group
BHD Group operates two divisions, BHD Chemical and BHD Sourcing — two divisions, one house, one point of accountability for a rubber plant ordering N-series carbon black and base oil SN 500. As an n-series carbon black and base oil SN 500 supplier for rubber plants, BHD Group supplies the grades described in this n-series carbon black and base oil SN 500 supplier for rubber plants overview against the compound specification a rubber plant hands over — not a substitute recipe. This n-series carbon black and base oil SN 500 supplier for rubber plants guide, and the examples and tips in it, are meant to help a compounding engineer, procurement lead or quality manager check a shipment before it is ordered, not after. Rubber plants evaluating an N-Series Carbon Black And Base Oil Sn 500 Supplier For Rubber Plants relationship are welcome to raise a specification and volume directly with BHD Chemical.
Sources
- ASTM International — ASTM D1765: Standard Classification System for Rubber Compounding Materials—Carbon Black — https://www.astm.org/Standards/D1765.htm
- American Petroleum Institute — API 1509 Annex E: Base Oil Interchangeability Guidelines — link
- US Environmental Protection Agency (1995) — AP-42 Section 6.1: Carbon Black — link
- US Environmental Protection Agency — Carbon Black Production Area Sources: National Emission Standards — link
- European Chemicals Agency (ECHA) — Guideline on REACH Annex XVII Entry 50 (PAHs) — link
- European Commission Joint Research Centre — JRC report on PAHs in consumer articles (JRC111476) — link
- European Commission — DG GROW — REACH Restrictions — link
Frequently asked questions
What is n-series carbon black and base oil sn 500 supplier for rubber plants?
It is a supplier that provides both N-series carbon black grades (such as N220, N330, N550, N660) and base oil SN 500 to rubber plants for compounding. BHD Group supplies both product lines through its Chemical division. Carbon black is a confirmed reinforcing filler used to make vehicle tyres, serving the tyre-rubber industry.
How does n-series carbon black and base oil sn 500 supplier for rubber plants work?
A rubber plant specifies an N-series grade against its cure-rate and reinforcement needs, following the four-character nomenclature set out in ASTM D1765, and specifies base oil SN 500 by base oil group and viscosity for processing and extension. The supplier sources and dispatches both against that specification, and any base oil interchange should be checked against API 1509 Annex E guidelines before substitution.
What are the benefits of n-series carbon black and base oil sn 500 supplier for rubber plants?
Sourcing both materials from one supplier gives a rubber plant a single accountable point for grade consistency, documentation, and delivery timing across two materials used together in the same compound. It also simplifies compliance checks, since PAH restrictions under REACH Annex XVII entry 50 apply to rubber and plastic components and are easier to track against one supplier's paperwork than several.
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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