Cresol Red

General description: A member of the class of 2,1-benzoxathioles that is 2,1-benzoxathiole 1,1-dioxide in which both of the hydrogens at position 3 have been substituted by 4-hydroxy-5-methylphenyl groups.

Application: Cresol red can be used in many common molecular biology reactions in place of other loading dyes. Cresol red can also be used as a color marker to monitor the process of agarose gel electrophoresis and polyacrylamide gel electrophoresis.

Catalogue Number: i880061

Technical Information
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Technical Information

o-Cresolsulfonphthalein, Kresolrot	Synonym
1733-12-6	CAS-No
217-064-2	EC-No
Deep red to brown powder	Appearance
C21H18O5S	Linear formula
Slightly soluble (20ºC)	Solub. in H2O
382.43 g/mol	Molecular Weight
290ºC (decomposes)	Melting point
600-620 Kg/m3	Bulk. Density
2934-99-90	HS-No
Eye irritation, Skin irritation, H315, H319, H335, P261, P264, P271, P280, P302+P352, P304+P340, P305+P351+P338, P312, P321, P332+P313, P337+P313, P362, P403+P233, P405, P501 LGK 10 - 13	GHS
Keep container tightly closed in a dry and well-ventilated place	Storage Conditions
pH 0.5 – pH 2.5 pink – brownish yellow	1st transition range
pH 6.5 – pH 8.5 yellow – purple	2nd transition range
passes test	Appearance of solution
passes test	Sensitive test