Explanatory notes
… and 28.53 ), nitrogen ( headings 28.11 , 28.14 and 28.25 ), phosphorus ( heading 28.53 ), carbon ( heading 29.01 ), and … oxygen ( heading 28.11 ), halogens ( heading 28.12 ), sulphur ( heading 28.13 ), hydrogen ( heading 28.14 ), … flakes. Soluble in water, deteriorates slightly in humid atmosphere. Strongly affected by the carbon dioxide in the …