CHEMOCHLOR CPW Grades Compared: A-520 to T-680, 52% to 68% Chlorine
CHEMOCHLOR is Chemoro’s chlorinated paraffin wax range. Buyers often search by the generic product name — chlorinated paraffin wax or CPW — and then narrow by grade, CAS number, application and documents. This guide explains how to compare the CHEMOCHLOR A-grade listings on CHEMAZON without guessing at specifications that must be confirmed from the TDS and batch COA.
What is CHEMOCHLOR?
CHEMOCHLOR is a Chemoro trade name for chlorinated paraffin wax (CPW). CPW is used as a secondary plasticiser and flame-retardant additive in PVC, rubber, paints and coatings, leather processing and metal working fluid applications.
The key SEO point is also the key buyer point: the trade name identifies the range, but buyers usually compare the material as chlorinated paraffin wax, CPW, chloroparaffin, CAS 85535-84-8 and then by grade. That is why every product page should mention both the CHEMOCHLOR grade and the generic CPW identity.
CHEMOCHLOR grades at a glance: A-520, R-520, A-580, A-620+, A-620, A-650 and T-680
Seven CHEMOCHLOR grades are listed on CHEMAZON. Buyers search them as CPW 52, CPW 58, CPW 62, CPW 65 and CPW 68, or by grade code — CHEMOCHLOR A-520, CPW A-620, chlorinated paraffin wax A-650. The figures below are the typical values each listing declares, ordered by chlorine content so the trade-off is readable top to bottom.
Two things this table makes obvious that a grade code alone hides. First, chlorine content and viscosity move together: A-520 pours at 5-12 Poise, T-680 is specified only as under 500 Poise. Second, the same chlorine level can come at two very different viscosities — A-620 and A-620+ are both 62% chlorine, but A-620+ runs at 15-40 Poise against A-620’s 60-150, which is the difference between grades in a compound you have to pump.
| Grade | Chlorine (% w/w) | Viscosity (Poise) | Specific gravity | CAS |
|---|---|---|---|---|
| A-520 | 52 ± 2.0 | 5.0 - 12.0 | 1.30 ± 0.02 | 85535-84-8 |
| R-520 | 52 ± 2.0 | 12.0 - 35.0 | 1.28 ± 0.02 | 85535-85-9 |
| A-580 | 58 ± 2.0 | 15.0 - 35.0 | 1.35 ± 0.02 | 85535-84-8 |
| A-620+ | 62 ± 2.0 | 15.0 - 40.0 | 1.40 ± 0.02 | 85535-84-8 |
| A-620 | 62 ± 2.0 | 60 - 150 | 1.40 ± 0.02 | 85535-84-8 |
| A-650 | 65 ± 2.0 | 100.0 - 300.0 | 1.45 ± 0.02 | 85535-84-8 |
| T-680 | 68 ± 2.0 | under 500.0 | 1.50 ± 0.02 | 85535-84-8 |
CPW 52 vs CPW 62: reading the grade number
The number in a CHEMOCHLOR grade code tracks chlorine content by weight — a 520 grade is around 52% chlorine, a 680 grade around 68% — and that single figure drives most of the decision. Higher chlorine improves flame retardancy and chemical resistance, but it raises viscosity and reduces plasticising efficiency. Lower chlorine flows more easily and plasticises better while contributing less flame resistance. A-520 and A-650 are not interchangeable in a PVC compound without reformulating.
The letter is a different axis, and it is worth checking rather than assuming. R-520 sits at the same 52% chlorine as A-520 but is a lower specific gravity (1.28 against 1.30), a higher viscosity band (12-35 against 5-12 Poise), a wider colour limit (under 60 HU against under 40) and — the part most easily missed — a different CAS number, 85535-85-9 rather than 85535-84-8. If your specification names a CAS, confirm it on the listing before you shortlist on the grade code.
Which specs matter for CPW?
For chlorinated paraffin wax procurement, buyers commonly check chlorine content, viscosity, specific gravity, colour, acidity, thermal stability, packing type and minimum order quantity. The grade name alone is not enough; two batches under the same trade range still need document-level verification.
On CHEMAZON, the product page gives the buyer the place to compare available batches and review COA/TDS/SDS before ordering. That document-first path is stronger than a plain supplier directory page because it answers the quality question before the purchase.
Where to buy CHEMOCHLOR CPW online in India
CHEMOCHLOR CPW grades can be compared on CHEMAZON by grade, CAS number, documents, available stock and seller. Signed-in buyers can compare per-kg pricing and select the batch that matches their process.
For faster Google ranking, each product page should use the generic term first — chlorinated paraffin wax or CPW — and keep CHEMOCHLOR plus the grade as the qualifier. That matches how buyers search: product first, grade second, seller third.
Frequently asked
What is CHEMOCHLOR A-620?
CHEMOCHLOR A-620 is a Chemoro chlorinated paraffin wax grade at 62% ± 2 chlorine by weight and 60-150 Poise. Buyers also search it as CPW A-620 or chlorinated paraffin wax A-620. A-620+ is the same chlorine content at a lower 15-40 Poise viscosity.
What is the difference between CPW 52 and CPW 62?
Chlorine content by weight — roughly 52% against 62% — and everything that follows from it. The 62% grades give better flame retardancy and chemical resistance at a higher viscosity and specific gravity; the 52% grades flow more easily and plasticise more efficiently. They are not interchangeable in a PVC compound without reformulating.
What is the CAS number for CHEMOCHLOR CPW?
Most of the listed CHEMOCHLOR grades — A-520, A-580, A-620, A-620+, A-650 and T-680 — are CAS 85535-84-8. R-520 is CAS 85535-85-9. Confirm the CAS number on the product page and documents before ordering, particularly if your specification names one.
How should I compare CHEMOCHLOR grades?
Start with chlorine content, viscosity and specific gravity to narrow the shortlist, then read the TDS for grade-level specifications and the COA for the exact batch values. Check application fit, packing, dispatch city, MOQ and available quantity before ordering.
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