M-Methyl Red supplier | CasNO.20691-84-3

Name
M-METHYL RED
EINECS 999-999-2
CAS No. 20691-84-3
Article Data4
CAS DataBase
Density 1.17 g/cm³
Solubility
Melting Point 207-208 °C
Formula C₁₅H₁₅N₃O₂
Boiling Point 486.189 °C at 760 mmHg
Molecular Weight 269.303
Flash Point 247.838 °C
Transport Information
Appearance
Safety
Risk Codes
Molecular Structure
Hazard Symbols
Synonyms Benzoicacid, 3-[[4-(dimethylamino)phenyl]azo]- (9CI);Benzoic acid,m-[[p-(dimethylamino)phenyl]azo]- (6CI,7CI,8CI);3-[4-(Dimethylamino)phenylazo]benzoic acid;3'-Carboxy-4-dimethylaminoazobenzene;m-Methyl red;
PSA 65.26000
LogP 3.86620

M-Methyl Red Chemical Properties

IUPAC Name: 3-(4-Dimethylaminophenyl)Diazenylbenzoic Acid
Synonyms: M-Methyl Red ; 3-((P-(Dimethylamino)Phenyl)Azo)Benzoicacid ; 3'-Carboxy-4-Dimethylaminoazobenzene ; M-((P-(Dimethylamino)Phenyl)Azo)-Benzoicaci ; 4-Dimethylaminoazobenzene-3'-Carboxylic Acid ; P-Dimethylaminoazobenzene-M-Carboxylic Acid ; 3-Methylred ; N-Methylred
Classification Code: Mutation data; Tumor data
Molecular Formula: C₁₅H₁₅N₃O₂
Molecular Weight: 269.3
Index of Refraction: 1.592
Molar Refractivity: 77.97 cm³
Molar Volume: 230.1 cm³
Surface Tension: 44.3 dyne/cm
Density: 1.17 g/cm³
Flash Point: 247.8 °C
Boiling Point: 486.2 °C at 760 mmHg
Vapour Pressure: 2.89E-10 mmHg at 25 °C
Enthalpy of Vaporization: 79.19 kJ/mol
Following is the molecular structure of M-Methyl Red (CAS NO.20691-84-3) is:

M-Methyl Red Uses

M-Methyl Red (CAS NO.20691-84-3) is used as an indicator dye that turns red in acidic solutions.

M-Methyl Red Toxicity Data With Reference

Organism	Test Type	Route	Reported Dose (Normalized Dose)	Effect	Source
rat	LD50	oral	3757mg/kg (3757mg/kg)		Neoplasma. Vol. 27, Pg. 237, 1980.

M-Methyl Red Safety Profile

Moderately toxic by ingestion. Questionable carcinogen with experimental tumorigenic data. Mutation data reported. When heated to decomposition it emits toxic fumes of NO_x.
RTECS: DG8959500

M-Methyl Red Analytical Methods

As an azo dye, M-Methyl Red (CAS NO.20691-84-3) may be prepared by diazotization of anthranilic acid, followed by reaction with dimethylaniline:

M-Methyl Red Specification

M-Methyl Red (CAS NO.20691-84-3) is an azo dye, and is a dark red crystalline powder.It is a pH indicator; it is red in pH under 4.4, yellow in pH over 6.2, and orange in between, with a pKa of 5.1.

Product Name

M-METHYL RED