CAS 7664-93-9: Sulfuric Acid (H2SO4)

Identity

CAS Number7664-93-9
Molecular FormulaH2SO4
IUPAC Namesulfuric acid
Molecular Weight98.08 g/mol
SMILESOS(=O)(=O)O
Synonymsoil of vitriol, battery acid, dihydrogen sulfate, H2SO4

2D Structure

Physical Properties

Density1.841 g/mL at 25°C
Boiling Point337.0°C
Melting Point10.0°C
Flash PointNone°C
Vapor Pressure0.001 kPa at 20°C
Refractive IndexnD = 1.399
Dielectric Constantε = 100.0

Safety & GHS Classification

GHS05Health Hazard

Storage: Store in acid-resistant containers (glass, PTFE, HDPE). Never add water to acid — always add acid to water slowly. Keep away from organic materials, metals, and bases. Use in well-ventilated area with acid-resistant PPE.

Material Compatibility Matrix

Plastics

MaterialRating
PTFEExcellent
PVCGood
PEGood
PPExcellent
PEEKExcellent
PVDFExcellent

Rubbers

MaterialRating
VitonGood
NBRSevere Effect
EPDMFair
SiliconePoor
FKMGood

Metals

MaterialRating
Stainless 316Excellent
AluminumPoor
CopperPoor
BrassPoor

Applications

External References: PubChem

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