| C | Sektion C — Chemie; Hüttenwesen | CHEMISTRY; METALLURGY | |
 | C05 | Düngemittel; deren Herstellung [4] | FERTILISERS; MANUFACTURE THEREOF [4] |
 | C05B | Phosphatische Düngemittel | PHOSPHATIC FERTILISERS |
 | C05B 5/00 | Thomasphosphat; andere Schlackenphosphate [1, 2006.01] | Thomas phosphate; Other slag phosphates [1, 2006.01] |