S P E C I F I C A T I O N S

THYMOLPHTHALEIN

Synonyms:				5’,5”-Diisopropyl-2’,2”-dimethylphenolphthalein; 
3,3-Bis[4-hydroxy-2-methyl-5-(1-ethylethyl)phenyl]-
1(3H)-	isobenzofuranone

CAS No.:				125-20-2

Description				White crystalline powder

Assay					minimum  92%

Loss on drying			<1.0%

Sulfated Ash				0.10 maximum

Clarity of Solution			To pass test

Visual Transition Interval		From pH 8.8 (colorless)
To     pH 10.5 (blue)

Effective: 12/16/08