Chromotrope 2R
Also known as: Acid Red 29, C.I. 16570, 2-(Phenylazo)chromotropic acid disodium salt, 4,5-Dihydroxy-3-phenylazo-2,7-naphthalenedisulfonic acid disodium salt, Disodium 4,5-dihydroxy-3-(phenyldiazenyl)-2,7-naphthalenedisulfonate, C.I. Acid Red 29, Chromotrope 2 R, Chromotrop 2R, Acid Red 29, disodium salt
Chromotrope 2R (CAS 4197-07-3) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C16H10N2Na2O8S2 and a molecular weight of 468.369 g/mol. 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.
- 4197-07-3
- Jingsj CID
- J-6814-4
- Molecular Formula
- C16H10N2Na2O8S2
- Molecular Weight
- 468.369 g/mol
- Category
- Organic Acids
- Last updated
- 8/21/2026
| Supplier | Purity / Pack | Base Price | Unit Price | Origin | |
|---|---|---|---|---|---|
Made to Order | - | - | CN China |
Physicochemical Properties
| Exact Mass | 467.967407 |
|---|---|
| PSA | 196.34000 |
| LogP | 4.63620 |
GHS Safety & Compliance
- H315 — Causes skin irritation
- H319 — Causes serious eye irritation
- H335 — May cause respiratory irritation
Activity & Biological Data
| Additional Information | [1]. Wagner BM. Correspondence: Chromotrope 2R. Toxicol Pathol. 2003 Nov-Dec;31(6):717. |
|---|
Frequently Asked Questions
What is the CAS number of Chromotrope 2R?
The CAS number of Chromotrope 2R is 4197-07-3.
What are the molecular formula and molecular weight of Chromotrope 2R?
Chromotrope 2R has molecular formula C16H10N2Na2O8S2 and molecular weight 468.369 g/mol.
Which suppliers offer Chromotrope 2R?
1 supplier(s) listed; request a quote for pricing.
Is Chromotrope 2R hazardous?
Chromotrope 2R 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 2R (CAS 4197-07-3)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-6814-4 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.