Arsenic.

Oral Answers to Questions — Safeguarding of Industries Act. – in the House of Commons on 23rd March 1922.

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Photo of Commander Sir Edward Nicholl Commander Sir Edward Nicholl , Penryn and Falmouth

45.

asked the President of the Board of Trade in what respect does industrial-grade arsenic differ from the dutiable article as included in the Board of Trade list?

Photo of Mr Stanley Baldwin Mr Stanley Baldwin , Bewdley

Industrial-grade arsenic differs from the dutiable article in that it is produced and refined on a large scale by processes which cannot be regarded as fine-chemical processes, but are in the nature of metallurgical processes, whilst the dutiable article is produced by typically fine-chemical processes for use, for instance, as an analytical reagent. The standard of purity required for the reagent is higher than that of the ordinary industrial grades.