Methyl blue
Also known as: Acid Blue 93, Water Blue, Cotton Blue, Helvetia Blue, Poirrier Blue C 4B, Brilliant Cotton Blue, C.I. 42780, C.I. Acid Blue 93
Methyl blue (CAS 28983-56-4) is a compound in the Organic Compounds category listed in the Jingsj chemical database. It has the molecular formula C37H28N3Na2O9S3 and a molecular weight of 799.799 g/mol. It is classified under GHS with signal word Warning and hazard statements H302 — Harmful if swallowed, H315 — Causes skin irritation and H319 — Causes serious eye irritation. It is listed by 1 supplier; request a quote for pricing. Record last updated Nov 2, 2026.
- CAS No.
- 28983-56-4
- Jingsj CID
- J-1094590-8
- Molecular Formula
- C37H28N3Na2O9S3
- Molecular Weight
- 799.799 g/mol
- Category
- Organic Compounds
- Last updated
- 11/2/2026
| Supplier | Purity / Pack | Base Price | Unit Price | Origin | |
|---|---|---|---|---|---|
Made to Order | - | - | CN China |
Physicochemical Properties
| Exact Mass | 799.070496 |
|---|---|
| PSA | 230.33000 |
| LogP | 10.31770 |
GHS Safety & Compliance
- H302 — Harmful if swallowed
- H315 — Causes skin irritation
- H319 — Causes serious eye irritation
- H335 — May cause respiratory irritation
Activity & Biological Data
| Additional Information | [1]. Mohammed Hassan, et al. Micellar effect on the kinetics of oxidation of methyl blue by Ce(IV) in sulfuric acid medium. Arabian Journal of Chemistry. Volume 8, Issue 1, January 2015, Pages 72-77. [2]. K.Kotak, et al. Photostability of Aniline Blue (CI 42755) and Methyl Blue (CI 42780). Dyes and Pigments. Volume 34, Issue 2, June 1997, Pages 159-167. |
|---|
Frequently Asked Questions
What is the CAS number of Methyl blue?
The CAS number of Methyl blue is 28983-56-4.
What are the molecular formula and molecular weight of Methyl blue?
Methyl blue has molecular formula C37H28N3Na2O9S3 and molecular weight 799.799 g/mol.
Which suppliers offer Methyl blue?
1 supplier(s) listed; request a quote for pricing.
Is Methyl blue hazardous?
Methyl blue has GHS signal word Warning and hazard statements H302 — Harmful if swallowed; H315 — Causes skin irritation; H319 — Causes serious eye 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. "Methyl blue (CAS 28983-56-4)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-1094590-8 (accessed 2026-11-07).
Data for reference only; verify product details with suppliers before purchase.