CPC Subgroup
C01B 25/023 of red phosphorus
Full Title
Phosphorus; Compounds thereof ( , C01B21/00, C01B23/00 take precedence; perphosphates C01B15/16) > Preparation of phosphorus > of red phosphorus
C01B 25/023 Phosphorus; Compounds thereof ( , C01B21/00, C01B23/00 take precedence; perphosphates C01B15/16) > Preparation of phosphorus > of red phosphorus