Sulfuric acid

CAS No.: 7664-93-9
Formula: H2O4S
Exact Mass: 97.96740
Molecular Weight: 98.07850
PSA: 82.98000
LogP: 0.42800
Description Feedback
Sulfuric acid (alternative spelling sulphuric acid) is a highly corrosive strong mineral acid with the molecular formula H2SO4 and molecular weight 98.079 g/mol. It is a pungent-ethereal, colorless to slightly yellow viscous liquid that is soluble in water at all concentrations. Sometimes, it is dyed dark brown during production to alert people to its hazards. The historical name of this acid is oil of vitriol.
Sulfuric acid is a diprotic acid and shows different properties depending upon its concentration. Its corrosiveness on other materials, like metals, living tissues or even stones, can be mainly ascribed to its strong acidic nature and, if concentrated, strong dehydrating and oxidizing properties. It is also hygroscopic, readily absorbing water vapour from the air. Sulfuric acid at a high concentration can cause very serious damage upon contact, since not only does it cause chemical burns via hydrolysis, but also secondary thermal burns through dehydration. It can lead to permanent blindness if splashed onto eyes and irreversible damage if swallowed.
Sulfuric acid has a wide range of applications including in domestic acidic drain cleaners, as an electrolyte in lead-acid batteries and in various cleaning agents. It is also a central substance in the chemical industry. Principal uses include mineral processing, fertilizer manufacturing, oil refining, wastewater processing, and chemical synthesis. It is widely produced with different methods, such as contact process, wet sulfuric acid process, lead chamber process and some other methods.

Properties Feedback
Appearance & Physical State:Colourless liquid.
Melting Point:10ºC
Boiling Point:337 °C (When sulfuric acid is above 300 °C, it will decompose slowly)
Flash Point:not available
Refractive Index:1.41827 (20ºC)
Water Solubility:miscible
Stability:Stable, but reacts with moisture very exothermically, which may enhance its ability to act as an oxidizing agent. Substances to be avoided include water, most common metals, organic materials, strong reducing agents, combustible materials, bases, oxidising
Storage Condition:Store at RT.
Vapor Pressure:1 mm Hg ( 146 °C)
Vapor Density:<0.3 (25 °C, vs air)

Safety Info Feedback
hazard declaration:H290; H314
hazard declaration add:
waring notice:P260; P280; P303 + P361 + P353; P304 + P340 + P310; P305 + P351 + P338
Hazard Class:8
Safety Statements:S26-S30-S45
HS Code:2807000010
Packing Group:II
WGK Germany:1
RIDADR:UN 3264 8/PG 3
Risk Statements:R35
Hazard Codes:C


Precursor and Product