IS 4581:2021 addresses Pure and Analytical Reagent Phosphorus Trichloride. This standard outlines the necessary specifications and methods for sampling and testing. Phosphorus trichloride finds applications in the production of synthetic organic chemicals, particularly in chlorinating agents to replace hydroxyl groups with chlorine. Additionally, it is utilized in the manufacturing of saccharin.

GRADES

Grade 1: Analytical Reagent

Grade 2: Pure

The substance should appear as a clear, colorless to light yellow, fuming liquid. It demonstrates solubility in various organic solvents such as ether, benzene, carbon disulfide, and carbon tetrachloride. Upon testing as per the specified method, the material must adhere to the requirements outlined in the standard.

TESTS

The subsequent test must be conducted for Phosphorus Trichloride.

• Test for Phosphorus trichloride %

• Boiling range test

• Relative density test

• Evaporation residue

• Test for Sulphate

• Test for Heavy metals

• Test for Iron

PACKING AND MARKING

Packing and marking procedures must comply with IS 4581:2021 standards. The material should be packaged in lead-coated steel containers or glass bottles. Each container must be labeled with essential details, including the material's name and grade, manufacturer's name and recognized trademark, net mass, and batch number.

The ISI Certification Mark should be affixed to each container, ensuring that the product inside meets all specified requirements. Manufacturers are required to obtain a BIS license from the Bureau of Indian Standards to use the standard mark (ISI Mark). This license is granted after a thorough assessment of manufacturing infrastructure, quality control measures, testing capabilities, and production processes.

PROCESS FOR BIS ISI MARK CERTIFICATION