2811198060
- Other inorganic acids and other inorganic oxygen compounds of non-metals
- Other inorganic acids
- Other
- Other
- Phosphorous acid, in solid or liquid (aqueous) forms, also denominated phosphonic acid, usually falling under Chemical Abstracts Service ('CAS') numbers 13598-36-2 and 10294-56-1. The Customs and Statistics (‘CUS’) numbers usually corresponding to this product are 0021895-1 and 0043878-8.