India consults on a revised terephthalic acid standard

The Bureau of Indian Standards launch a consultation on a draught amended standard for terephthalic acid, which includes new standards, sampling techniques, and testing on February 23, 2022.

The first edition of the standard was released in 2001. In this (first) iteration, test procedures for determining colour, ash, and acid value have been updated to reflect the most recent technological advances. The HPLC method for determining the amount of 4-carboxybenzaldehyde (4-CBA) and p-toluic acid (p-TA) has also been changed. The test technique for determining p-toluic acid, 4-carboxybenzaldehyde, and benzoic acid in purified terephthalic acid using normal voltage mode capillary electrophoresis, as well as the test method for determining titanium in Annex E, have been incorporated. IS 15030: 2001 Amendment No. 1 has been incorporated into this revision.

Terephthalic acid is a popular constituent in paints, synthetic fibres, and resins, as well as a step in the production of polyethylene terephthalate (PET) for liquid packing and polyester films.

Because of the substance's flammable and explosive properties, the BIS has proposed modifying the standard. This includes the following requirements: 

The technique for obtaining representative samples of the material and the compliance criteria shall be as specified in IS 5299, section 4. The BIS is soliciting comments through March 19 on the modifications to Indian Standard (IS) 15030:2001.

Kindly refer https://www.gpcgateway.com/uploads/media/Nb5PCtiqypot4lwCTxsyqdsWm.pdf for more information.