Material Safety Data Sheet

SECTION 9 – Physical and Chemical Properties 

Physical State: Liquid 

Appearance: Colorless  

Odour: Odourless 

pH: 0.3 (1 N solution); 1.2 (0.1 N solution); 2.1 (0.01 N solution) 

Vapour Pressure: Less than 0.04 kPa (0.3 mm Hg) at 25 °C 

Vapour Density: 3.38 (air = 1) 

Evaporation Rate: Slower than ether. 

Viscosity: Negligible. 

Boiling Point: 93% (w/w): 279 °C (534.2 °F); 98% (w/w): 310-340 °C (590- 

644 °F); 100% (w/w): 290 °C (554.0 °F) 

Freezing/Melting Point: 93% (w/w): -32 °C (-25.6 °F); 98% 

(w/w): 3 °C (37.4 °F); 100% (w/w): 10.4-10.5 °C (50.6-50.9 °F) 

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Decomposition Temperature: 340 °C 

Solubility: Soluble in water, in all proportions with generation of 

much heat. Soluble in all proportions in ethanol (decomposes). 

Specific Gravity/Density: 93% (w/w): 1.835 g/cm3; 98% (w/w): 

1.844 g/cm3; 100% (w/w): 1.839 g/cm3 @ 15 °C 

Molecular Formula: H2SO4 

Molecular Weight: 98.0716