Methyl Yellow Acid-Base Indicator solution – 50 ml
IUPAC: p-Dimethylaminoazobenzene (C14H15N3)
Synonyms: 4-Dimethylaminoazobenzene, N,N-Dimethyl-4-phenylazoaniline, N,N-Dimethyl-4-aminoazobenzene, Butter Yellow, Solvent Yellow 2, C.I. 11020
Amount: 50 ml
Appearance and odour: wine red solution in alcohol.
Packaging: professional white HDPE 50 ml dropper bottle with screw-on conical protective cap. Labelled. For first use, cut a few mm off the top end of the dropper to render it operational. Replace protective cap for safe keeping.
Description and uses: Acid-base indicator that changes colour from below pH 2.9 red to above pH 4.0 yellow and vice versa. Typical use is the titration of a weak base (e.g. ammonia solution) with a strong acid. Add 1 – 3 drops to solution to be titrated.
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CAS: 60-11-7 (pure methyl yellow)