Phenolphthalein NEW

TEST ITEM:

SPECIFICATION:

RESULTS:

Characteristics:

A white or almost white powder, practically insoluble in water, soluble in alcohol.

A white powder, practically insoluble in water, soluble in alcohol.

Melting Point

It melts at about 260°C-262°C

261°C ～262°C

Identification

A:Positive

B:Positive

A:Positive

B:Positive

Appearance of solution

The solution is clear and not more intensely coloured than reference solution Y7

Complies

Related substances

Less than 0.01%

＜0.01%

Heavy metals

Not more than0.001%

＜0.0009%

Acidity or alkalinity

Complies

Complies

Chlorides

Not more than 0.01%

＜0.01%

Sulphates

Not more than 0.02%

＜0.02%

Loss on drying

Not more than 0.5%

0.12%

Sulphated ash

Not more than 0.1%

0.01%

Assay

98.0%-101.0%(C20H14O4)

99.6%

Storage condition:

Store in well closed drums, in cool and dry storage area.