Methyl Red Sodium Salt C.I. 13020

£10.64 to £43.88

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Variation ID		Product Code	Pack Size	List Price
6359	photo_camera	RRBD70-U	10g RRBD70-U	£10.64
6360	photo_camera	RRBD70-W	25g RRBD70-W	£18.69
6361	photo_camera	RRBD70-2W	50g RRBD70-2W	£26.07
6362	photo_camera	RRBD70-X	100g RRBD70-X	£43.88

Methyl red is an indicator dye that turns red in acidic solutions. It is a pH indicator, turning red under pH 4.4, yellow over pH 6.2, and orange in between those values. It is used in microbiology in the Voges-Proskauer test to identify bacteria that produce stable acids through mixed acid fermentation of glucose.

pH Indicator
Identification of bacteria in Microbiology

C.I.13020

Dye Content: >90%
Molecular Formula: C₁₅H₁₄N₃NaO₃
Molecular Weight: 291.29 g/mol
Transition Range: pH4.2 (Violet Red) - pH6.2 (Brownish/Yellow)
Maximum Absorption (pH4.2): 523-527nm
Maximum Absorption (pH6.2): 430-434nm
Absorptivity(A1%/1cm@pH4.2): 1200-1300
Absorptivity(A1%/1cm@pH4.2): 675-735
Loss on Drying: <5%