Thermo Scientific Chemicals Methyl Yellow, indicator

Description

Methyl Yellow used as a pH indicator. It is an acid-base indicator that changes color from below pH 2.9 red to above pH 4.0 yellow and vice versa. Typical use is in the titration of a weak base with a strong acid.

This Thermo Scientific Chemicals brand product was originally part of the Alfa Aesar product portfolio. Some documentation and label information may refer to the legacy brand. The original Alfa Aesar product / item code or SKU reference has not changed as a part of the brand transition to Thermo Scientific Chemicals.

Applications
Methyl Yellow used as a pH indicator. It is an acid-base indicator that changes color from below pH 2.9 red to above pH 4.0 yellow and vice versa. Typical use is in the titration of a weak base with a strong acid.

Solubility
Insoluble in water. Soluble in alcohol.

Notes
Transition interval: pH 2.9 (red) to pH 4.0 (yellow)

Specifications

Chemical Identifiers

• CAS: 60-11-7
• Molecular Formula: C14H15N3
• Molecular Weight (g/mol): 225.30
• MDL Number: MFCD00008308
• InChI Key: JCYPECIVGRXBMO-UHFFFAOYSA-N
• Synonym: methyl yellow, dimethyl yellow, 4-dimethylamino azobenzene, 4-dimethylaminoazobenzene, solvent yellow 2, sudan yellow, fat yellow, p-dimethylaminoazobenzene, stear yellow jb, sudan yellow gg
• PubChem CID: 6053
• ChEBI: CHEBI:17903
• SMILES: CN(C)C1=CC=C(C=C1)N=NC1=CC=CC=C1

• Melting Point: 110°C to 112°C (decomposition)
• Odor: Odorless
• Quantity: 25 g
• UN Number: UN2811
• Beilstein: 746016
• Merck Index: 14,3229
• Solubility Information: Insoluble in water; Soluble in alcohol.
• IUPAC Name: N,N-dimethyl-4-phenyldiazenylaniline
• Formula Weight: 225.3
• Chemical Name or Material: Methyl Yellow, indicator

Safety and Handling

Signal Word

• Danger

Hazard Category

• Acute toxicity Category 3
• Carcinogenicity Category 2

Hazard Statement

• H301-Toxic if swallowed.
• H351-Suspected of causing cancer.

Precautionary Statement

• P201-Obtain special instructions before use.
• P264-Wash face, hands and anyexposed skin thoroughly after handling.
• P280-Wear protective gloves/protective clothing/eye protection/face protection.
• P301+P310-IF SWALLOWED: Immediately call a POISON CENTER/doctor /
• P308+P313-IF exposed or concerned: Get medical advice/attention.

Supplemental information

• MIXTURE LIST-Contains : N,N-dimethyl-4-(phenylazo)benzenamine

RUO – Research Use Only