Azure B
Also known as: 3-(Dimethylamino)-7-(methylamino)phenothiazin-5-ium chloride, N,N,N'-Trimethylthionin, Methyleneazure, Trimethylthionine chloride, Azure I, C.I. 52010, Phenothiazin-5-ium, 3-(dimethylamino)-7-(methylamino)-, chloride
Azure B (CAS 531-55-5) is a compound in the Organic Compounds category listed in the Jingsj chemical database. It has the molecular formula C15H16ClN3S and a molecular weight of 305.826 g/mol. Key property: a melting point of 205-210 °C (dec.)(lit.). It is listed by 1 supplier; request a quote for pricing. Record last updated Aug 21, 2026.
- CAS No.
- 531-55-5
- Jingsj CID
- J-4791-6
- Molecular Formula
- C15H16ClN3S
- Molecular Weight
- 305.826 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 | 205-210 °C (dec.)(lit.) |
|---|---|
| Exact Mass | 305.075348 |
| PSA | 56.17000 |
Activity & Biological Data
| Additional Information | [1]. Löhr W,et al. The azure dyes: their purification and physicochemical properties. II. Purification of azure B. Stain Technol. 1975 May;50(3):149-56. [2]. Delport A, et al. Azure B and a synthetic structural analogue of methylene blue, ethylthioninium chloride, present with antidepressant-like properties. Life Sci. 2014 Nov 11;117(2):56-66. |
|---|
Customs & Trade Information
| HS Code | 2934300000 |
|---|---|
| Summary | 2934300000. other compounds containing in the structure a phenothiazine ring-system (whether or not hydrogenated), not further fused. VAT:17.0%. Tax rebate rate:13.0%. . MFN tariff:6.5%. General tariff:20.0% |
Frequently Asked Questions
What is the CAS number of Azure B?
The CAS number of Azure B is 531-55-5.
What are the molecular formula and molecular weight of Azure B?
Azure B has molecular formula C15H16ClN3S and molecular weight 305.826 g/mol.
Which suppliers offer Azure B?
1 supplier(s) listed; request a quote for pricing.
What are the upstream and downstream products of Azure B?
For Azure B, Upstream Products: N,N-Dimethyl-1,4-benzenediamine.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "Azure B (CAS 531-55-5)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-4791-6 (accessed 2026-11-09).
Data for reference only; verify product details with suppliers before purchase.