IS 11657:1986
Phosphorus oxychloride, a non-metal halide oxide (POCl3)
BIS QCO · ISI MARK · 1 LINES · PHOSPHORUS COMPOUNDS QUALITY CONTROL ORDER, NOTIFIED VIDE S.O. 1899(E)
IS 11657 specifies the requirements for technical-grade phosphorus oxychloride, a phosphorus-chlorine compound used as a chlorinating agent in pharmaceutical, agrochemical and dye intermediate synthesis. The standard governs assay, acidity, chloride content and limits of heavy-metal impurities.
At a glance
1
Tariff lines covered (8-digit HSN)
Chapter 28
Primary HSN chapter
ISI
Mark scheme
Phosphorus Compounds Quality Control Order, notified vide S.O. 1899(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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