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METHYL RED
SPECIFCIATION
 PRODUCT NAME  METHYL RED
 CAS NO.  493-52-7
 C.I.NO.  13020
 CHEMICAL FORMULA  C15H15N3O2
 MOLECULAR WEIGHT
 269.31
 MELTING POINT  179-182° C
 DYE CONTENT  ~95%
 ABSORPTION MAX(PH4.5)  523-526 NM
 ABSORPTION MAX(PH6.2)  430-434 NM
 ABSORPTIVITY(1%,1CM)PH 4.5  >1330
 ABSORPTIVITY(1%,1CM)PH 6.2  >700
 TRANSITION RANGE  PH 4.2 - 6.2 RED - YELLOW
 LOSS ON DRYING (110 ° C)  < 5%
 
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