Dimenazine Diciturate

SPECIFICATION

RESULT

A Yellow to orange yellow powder

A Yellow powder.

Soluble at 20°C in 14 parts of water, slightly soluble in alcohol, very slightly soluble in ether, and in chloroform.

Complies

A) Gives colour reaction with potassium guaiacolsulphonate

B)  The extinction of a 1 cm layer of a solution containing the equivalent of 0.001% w/v of the substances, at the maxima 370 nm is about 0.65

C)  The infrared absorption spectrum of the test is concordant with the infrared absorption spectrum of working standard.

Complies

0.644

Complies

pH of 1%w/v solution in water is 5.8 to 6.5

5.99

7.0 – 13.0 %

10.14%

10.0 - 13.0 %

11.72 %

NMT  0.5 %

0.06 %

NMT 200 ppm

Less than 200 ppm

204.0 - 212ºC

207 – 209 ºC

When test solution viewed horizontally against a white background the colour should not be darker than primary solution (0.176%w/v of potassium dichromate)

Complies

98.0 % to 102.0 % (BY UV, ODB)

100.87% (BY UV, ODB)