Methylthymol Blue
Also known as: Methylthymol Blue tetrasodium salt, 3,3'-Bis[N,N-bis(carboxymethyl)aminomethyl]thymolsulfonphthalein, Thymolsulfonphthalein-3,3'-bis(methyliminodiacetic acid sodium salt), MTB, Methylthymol Blue Sodium Salt, N-Methylthymol Blue, 3,3'-Bis[N,N-bis(carboxymethyl)aminomethyl]thymolsulfonphthalein Sodium Salt, Acetic acid, [3H-2,1-benzoxathiol-3-ylidenebis[(6-hydroxy-5-isopropyl-2-methyl-m-phenylene)methylenenitrilo]]tetra-, S,S-dioxide, tetrasodium salt, Glycine, N,N'-[3H-2,1-benzoxathiol-3-ylidenebis[[6-hydroxy-2-methyl-5-(1-methylethyl)-3,1-phenylene]methylene]]bis[N-(carboxymethyl)-, S,S-dioxide, tetrasodium salt
Methylthymol Blue (CAS 1945-77-3) is a compound in the Alcohols category listed in the Jingsj chemical database. It has the molecular formula C37H44N2NaO13S and a molecular weight of 779.81500 g/mol. Key properties include a boiling point of 891.6±65.0 °C at 760 mmHg, a density of 1.4±0.1 g/cm3 and a flash point of 493.0±34.3 °C. It is listed by 1 supplier; request a quote for pricing. Record last updated Nov 2, 2026.
- CAS No.
- 1945-77-3
- Jingsj CID
- J-31658-3
- Molecular Formula
- C37H44N2NaO13S
- Molecular Weight
- 779.81500 g/mol
- Category
- Alcohols
- Last updated
- 11/2/2026
| Supplier | Purity / Pack | Base Price | Unit Price | Origin | |
|---|---|---|---|---|---|
Made to Order | - | - | CN China |
Physicochemical Properties
| Boiling Point | 891.6±65.0 °C at 760 mmHg |
|---|---|
| Density | 1.4±0.1 g/cm3 |
| Flash Point | 493.0±34.3 °C |
| Exact Mass | 756.256409 |
| PSA | 247.89000 |
| LogP | 5.20 |
| Vapor Pressure | 0.0±0.3 mmHg at 25°C |
| Refractive Index | 1.636 |
| Additional Property | 460g/l |
Activity & Biological Data
| Additional Information | [1]. Adamski J M, et al. Application of the methylthymol blue sulfate method to water and wastewater analysis. Analytical Chemistry, 1975, 47(7): 1191-1194. [2]. Gindler EM, et al. Rapid colorimetric determination of calcium in biologic fluids with methylthymol blue. Am J Clin Pathol. 1972 Oct;58(4):376-82. |
|---|
Frequently Asked Questions
What is the CAS number of Methylthymol Blue?
The CAS number of Methylthymol Blue is 1945-77-3.
What are the molecular formula and molecular weight of Methylthymol Blue?
Methylthymol Blue has molecular formula C37H44N2NaO13S and molecular weight 779.81500 g/mol.
Which suppliers offer Methylthymol Blue?
1 supplier(s) listed; request a quote for pricing.
Data compiled from public chemical databases such as PubChem and supplier catalogs; supplier offers are provided by suppliers.
Last updated:
How to cite: Jingsj. "Methylthymol Blue (CAS 1945-77-3)". Jingsj Chemical Database. https://www.jingsj.com/compound/J-31658-3 (accessed 2026-11-06).
Data for reference only; verify product details with suppliers before purchase.