IS 4581:1978
Phosphorus trichloride, technical grade (PCl3)
BIS QCO · ISI MARK · 1 LINES · CHEMICALS AND PETROCHEMICALS (INORGANIC HALIDES) QUALITY CONTROL ORDER, NOTIFIED VIDE S.O. 1897(E)
IS 4581 specifies the requirements for technical-grade phosphorus trichloride, prescribing assay by chloride content, free-phosphorus limit, residue on distillation and packaging-stability criteria. The standard governs the feedstock supplied to organophosphorus, agrochemical and pharmaceutical synthesis.
At a glance
1
Tariff lines covered (8-digit HSN)
Chapter 28
Primary HSN chapter
ISI
Mark scheme
Chemicals and Petrochemicals (Inorganic Halides) Quality Control Order, notified vide S.O. 1897(E)
Governing Quality Control Order
Tariff lines covered
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Speak to an Expert Last verified against gazette notifications: 2026-05-16. Source: BIS / Indian Customs CUSDATA.
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