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CONGO RED (C.I. 22120) INDICATOR PH 3.0-

Brands: MERCK
Rp 1.843.000

Synonym(s): Congo red (C.I. 22120)

Empirical Formula (Hill Notation): C32H22N6Na2O6S2

Appearance: Red-brown to brownishred powder, eventually with granular parts.

Appearance of solution (1.0 gr/l; water): Almost clear to slightly turbid, red

Transition range: pH 3.0 - pH 5.2violet - orange-red

Loss on drying (110 °C): ≤ 5 %

Sensitivity test: passes test

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PT. Multi Medika Laboratory

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