Chromotrope 2B
Also known as: C.I. Acid Red 176, C.I. 16575, Acid Red 176, 4,5-Dihydroxy-3-(p-nitrophenylazo)-2,7-naphthalenedisulfonic acid disodium salt, disodium 4,5-dihydroxy-3-(p-nitrophenylazo)naphthalene-2,7-disulphonate, Chromotrop 2 B, p-Nitrobenzeneazochromotropic acid sodium salt, Chromotrope 2B disodium salt
Chromotrope 2B (CAS 548-80-1) is a compound in the Organic Compounds category listed in the Jingsj chemical database. It has the molecular formula C16H9N3Na2O10S2 and a molecular weight of 513.36600 g/mol. Key property: a melting point of 300 °C. It is classified under GHS with signal word Warning and hazard statements H315 — Causes skin irritation, H319 — Causes serious eye irritation and H335 — May cause respiratory irritation. It is listed by 1 supplier; request a quote for pricing. Record last updated Aug 21, 2026.
- CAS No.
- 548-80-1
- Jingsj CID
- J-6801-9
- Molecular Formula
- C16H9N3Na2O10S2
- Molecular Weight
- 513.36600 g/mol
- Category
- Organic Compounds
- Last updated
- 8/21/2026
| Supplier | Purity / Pack | Base Price | Unit Price | Origin | |
|---|---|---|---|---|---|
Made to Order | - | - | CN China |
Physicochemical Properties
| Melting Point | 300 °C |
|---|---|
| Exact Mass | 512.95200 |
| PSA | 242.16000 |
| LogP | 5.06760 |
GHS Safety & Compliance
- H315 — Causes skin irritation
- H319 — Causes serious eye irritation
- H335 — May cause respiratory irritation
Customs & Trade Information
| HS Code | 2927000090 |
|---|---|
| Summary | 2927000090 other diazo-, azo- or azoxy-compounds。Supervision conditions:None。VAT:17.0%。Tax rebate rate:9.0%。MFN tariff:6.5%。General tariff:30.0% |
Frequently Asked Questions
What is the CAS number of Chromotrope 2B?
The CAS number of Chromotrope 2B is 548-80-1.
What are the molecular formula and molecular weight of Chromotrope 2B?
Chromotrope 2B has molecular formula C16H9N3Na2O10S2 and molecular weight 513.36600 g/mol.
Which suppliers offer Chromotrope 2B?
1 supplier(s) listed; request a quote for pricing.
Is Chromotrope 2B hazardous?
Chromotrope 2B has GHS signal word Warning and hazard statements H315 — Causes skin irritation; H319 — Causes serious eye irritation; H335 — May cause respiratory irritation.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "Chromotrope 2B (CAS 548-80-1)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-6801-9 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.