Caffeine

Its chemical formula is C8H10N4O2 and is used in energy drinks, etc.

Item

Requirement

Result

Characters

Appearance

Granules

Complies

Color

White

Complies

Identification

Identification

Must Comply

Complies

Melting range

Beginning of Melting

Min 235.0 ºC

236.8 ºC

End of Melting

Max 239.0 ºC

237.4 ºC

Solution in Water

Opalescence

Clear

Complies

Color

Colorless

Complies

Acidity

Acidity

Must Comply

Complies

Foreign Alcaloids

Foreign Alcaloids

Must Comply

Complies

Sulfate

Sulfate

Max 240 ppm

<240 ppm

Heavy Metals

Heavy Metals (lead)

Max 10 ppm

<10 ppm

Readily Carbonisable Subst.

Opalescence

Clear

Complies

Color: B

Min 7

9

Color

Max Ref. Solution D of USP

Complies

Loss on Drying

Loss on Drying

Max 0.5%

<0.1%

Residue on Ignition

Residue on Ignition

Max 0.1%

<0.1%

Related substances (HPLC)

Impurities

Max 0.10 per Cent Each

Complies

Sum of all Impurities

Max 0.1%

<0.1%

Content

Content (Titration)

99.5 to 100%

In Dry 99.8% sub

Content

Content (HPLC)

98.5 to 101.0%

In Dry 99.7% sub

Organic Volatile Impurities

Organic Volatile Impurities

Must Comply

Complies

Chloroform

Max 60 ppm

Complies

Particle Size

Below 1.40 mm (No. 14)

Min 95%

100%

Below 0.212 mm (No. 70)

Max 10%

3%

 

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