CPC Subgroup
C01B 25/04 Purification of phosphorus
Full Title
Phosphorus; Compounds thereof ( , C01B21/00, C01B23/00 take precedence; perphosphates C01B15/16) > Purification of phosphorus
2 direct subcodes
Child Classifications
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- C01B 25/043 of red phosphorus
- C01B 25/047 of yellow phosphorus