Para Toluene Sulphonic Acid also known as PTSA which is an organic compound with the formula CH3C6H4 SO3H. Its IUPAC name is 4- Methylbenzene 1-Sulfonic Acid. It is a white solid that is soluble in water, alcohol, and other polar organic solvents. It is above one of the strongest acids that are solid and hence conveniently weighed.

Presence of starch derivatives absent

Sr No.

Particular

Limit

Results

1

Appearance

White to off white light pink crystalline solid

White crystalline solid

2

Assay on Monohydrate Basis (%)

98.5 min

99.1

3

Free Sulphuric Acid (%)

0.5% max

0.10

4

Total Moisture (%)

12.0 max

11.73
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