Molecular Structure of Arsacetin tetrahydrate (CAS NO. 6018-32-2):

IUPAC Name: sodium (3-acetamidophenyl)-hydroxyarsinate 
Empirical Formula: C₈H₉AsNNaO₄ 
Molecular Weight: 281.0727 
Classification Code: Drug / Therapeutic Agent

Arsenic and its compounds are on the Community Right-To-Know List.

Moderately toxic by intravenous route. See also ARSENIC COMPOUNDS. When heated to decomposition it emits very toxic fumes of As and NO_x.

OSHA PEL: TWA 0.5 mg(As)/m³
ACGIH TLV: BEI: 35 μ (As)/L inorganic arsenic and methylated metabolites in urine

 Arsacetin tetrahydrate ,its CAS number is 6018-32-2,it can be called p-Acetamidobenzenearsonic acid, sodium salt, tetrahydrate ; Sodium acetylarsanilate tetrahydrate ; N-Acetylarsanilic acid, sodium salt, tetrahydrate ; N-Acetyl-p-aminobenzenearsonic acid, sodium salt, tetrahydrate ; Arsacetin tetrahydrate and (4-(Acetylamino)phenyl)arsonic acid sodium salt tetrahydrate .