Ponceau S
Also known as: Acid Red 112, C.I. 27195, C.I. Acid Red 112, Ponceau S extra, Ponceau Red S, Fast Ponceau 2B, Tetrasodium 3-hydroxy-4-[(E)-{2-sulfonato-4-[(E)-(4-sulfonatophenyl)diazenyl]phenyl}diazenyl]naphthalene-2,7-disulfonate
Ponceau S (CAS 6226-79-5) is a compound in the Organic Compounds category listed in the Jingsj chemical database. It has the molecular formula C22H12N4Na4O13S4 and a molecular weight of 760.569 g/mol. Key property: a density of 1.01 g/mL at 20 °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.
- 6226-79-5
- Jingsj CID
- J-41096-8
- Molecular Formula
- C22H12N4Na4O13S4
- Molecular Weight
- 760.569 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
| Density | 1.01 g/mL at 20 °C |
|---|---|
| Exact Mass | 759.887451 |
| PSA | 331.99000 |
| LogP | 7.31580 |
| Refractive Index | n20/D 1.338 |
| Storage Conditions | Store at RT. |
| Additional Property | 10 g/L |
GHS Safety & Compliance
- H315 — Causes skin irritation
- H319 — Causes serious eye irritation
- H335 — May cause respiratory irritation
Activity & Biological Data
| Additional Information | [1]. Sander H, et, al. Ponceau S waste: Ponceau S staining for total protein normalization. Anal Biochem. 2019 Jun 15; 575: 44-53. [2]. Litovchick. Staining the Blot for Total Protein with Ponceau S. Cold Spring Harb Protoc. 2020 Mar 2; 2020(3): 098459. |
|---|
Customs & Trade Information
| HS Code | 32041200 |
|---|
Frequently Asked Questions
What is the CAS number of Ponceau S?
The CAS number of Ponceau S is 6226-79-5.
What are the molecular formula and molecular weight of Ponceau S?
Ponceau S has molecular formula C22H12N4Na4O13S4 and molecular weight 760.569 g/mol.
Which suppliers offer Ponceau S?
1 supplier(s) listed; request a quote for pricing.
Is Ponceau S hazardous?
Ponceau S 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. "Ponceau S (CAS 6226-79-5)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-41096-8 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.