Synonym(s): 1-Pentanesulfonic acid sodium salt monohydrate Formula: CH3(CH2)4SO3Na H2O Formula weight: 192.21 (174.19anhy) CAS Number: 207605-40-1 Harmonized Tariff Code:  2904.10 Safety Phrases: 22-24/25 Do not breathe dust. Avoid contact with skin and eyes.