IS 5158:1987 pertains to Technical Grade Phthalic Anhydride. This standard outlines the necessary specifications, as well as the methods for sampling and testing, ensuring suitability for industrial applications.

The material can exist in solid or molten form, and when solid, it should take the form of flakes, pellets, or crystals. It must be devoid of agglomerates, colored or stained pieces, and any other foreign substances.

When subjected to the specified method of testing, the material must adhere to the requirements outlined in the standard. The manufacturer will guarantee safe handling and storage of the material in accordance with established standards. Due to its moderate fire risk and irritating characteristics, caution is necessary during handling. Direct skin contact with the material should be avoided. Minimizing exposure to its vapor, fumes, and dust is crucial, and wearing safety goggles is imperative for eye protection.

TESTS

The subsequent test must be conducted for Phthalic Anhydride.

• Description

• Crystallizing point

• Colour of the molten material

• Free acidity

• Maleic Anhydride & other oxidisable impurities

• Ash

• Iron

• Naphthalene

PACKING AND MARKING

Packing and marking procedures must comply with IS 5158:1987 standards. The Standard mark (ISI Mark) should be affixed on every container of technical grade phthalic anhydride, ensuring that the product inside each container meets all specified requirements.

Every container should display labels containing the required information as outlined in the standard. Manufacturers are obligated to acquire a BIS license from the Bureau of Indian Standards to utilize the standard mark (ISI Mark). This license is granted following a thorough evaluation of manufacturing infrastructure, quality control measures, testing capabilities, and production processes.

PROCESS FOR BIS ISI MARK CERTIFICATION