Revised Standard from Last Update.

1. SCOPE

This standard prescribes two methods for estimation of pure colouring matter (indigotin) present in the commercially available natural and synthetic indigo in power or paste form or in the form of concentrated solution of leuco compound.

2. REFERENCES

The following standards contain provisions which, through reference in this text, constitute provisions of this standard. At the time of publication, the editions indicated were valid. All standards are subject to revision and parties to agreements based on this standard are encouraged to investigate the possibility of applying the most recent editions of the standards indicated below.

1070 : 1992 Reagent grade water – Specification (third revision)