Methyl Red (C.I. 13020)(Reag. USP, Ph. Eur.) for analysis, ACS

Melting Point:

179 °C

Solubility:

water 0.1 g/l at 20 °C
alcohol 2 g/l

Physical Description:

solid

Product Code:

131617

Product Name:

Methyl Red (C.I. 13020)(Reag. USP, Ph. Eur.) for analysis, ACS

Quality Name:

for analysis, ACS

Headline Comment:

pH indicator 4,2 red; 6,2 yellow

Specifications:

Identity: IR passes test
A 1% , 1 cm, λ 1 max. (calc. a.d.s.): >1500
A 1% , 1 cm, λ 2 max. (calc. a.d.s.): >670
A 1% , 1 cm, λ 3 max.: >750
λ of max. ABS: 525 - 528 nm
λ of max. ABS: 430 - 434 nm
λ of max. ABS in C2H5OH: 490 - 495 nm
Melting range: 179-182°C
Range of Transition interval according to ACS: passes test
T.L.C.: passes test

Maximum limit of impurities
pH transition interval: red: 4.2
pH transition interval: yellow: 6.2
Insoluble matter in C2H5OH: passes test
Loss on drying at 110°C: 5%
Residue on ignition (as SO4): 2 %

WGK:

2

Storage:

Room Temperature.

Master Name:

Methyl Red *(C.I. 13020)

Synonyms Long Text:

2-[4-(Dimethylamino)Phenylazo]Benzoic Acid, AcidRed 2

EINECS:

207-776-1

CS:

2927 00 00 90

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