Production
Sulfamic acid is produced industrially by treating urea with a mixture of sulfur trioxide and sulfuric acid (or oleum). The conversion is conducted in two stages:
- OC(NH2)2 + SO3 → OC(NH2)(NHSO3H)
- OC(NH2)(NHSO3H) + H2SO3 → CO2 + 2 H3NSO3
In this way, approximately 96,000 tons were produced in 1995.
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