Isopropyl alcohol (IPA, isopropanol, CAS 67-63-0) is supplied here at 99.9% minimum purity with water at 0.10% maximum, a carbonyl value of 0.01% maximum and a sulfide content of 1 mg/kg maximum. That combination is not a standard industrial-grade specification: the low sulfur and low carbonyl limits are what make the material suitable for catalyst-sensitive reactions, electronics cleaning and pharmaceutical use as well as for coatings and general solvent duty.

Specification

Parameter	Limit	Why it matters
Appearance / odour	Colourless clear liquid, no odour	Odour is the quickest field indicator of carbonyl or sulfur contamination
Purity	Min 99.9%	High-purity grade; the balance is water and trace organic impurities
Colour (Hazen)	Max 10	Very tight colour limit – a requirement in electronics and pharmaceutical use, not a cosmetic one
Water content	Max 0.10%	Near-anhydrous grade; IPA forms an azeotrope with water, so this limit is a processing achievement, not a default
Acidity (as acetic acid)	Max 0.002%	Free acid corrodes metals and can catalyse esterification or acetal formation
Evaporation residue	Max 0.002%	Non-volatile matter – the parameter that matters for cleaning and for electronics, where residue is a defect
Carbonyl value	Max 0.01%	Acetone and other carbonyls are the main organic impurity; they interfere with reactions and show up in odour
Sulfide content	Max 1 mg/kg	A limit most industrial IPA specifications do not carry at all. Sulfur poisons hydrogenation and polymerisation catalysts at ppm levels and contaminates electronic surfaces
Water solubility test	Pass	Confirms the material mixes clear with water – a check on insoluble hydrocarbon contamination

What the grade is for

Grade	Typical specification	Constraint it removes
Industrial	99.5%, water up to 0.5%, colour and residue limits looser	None – general solvent duty
Anhydrous / high purity – this grade	99.9%, water max 0.10%, carbonyl max 0.01%, sulfide max 1 ppm	Water-sensitive reactions, catalyst-sensitive systems, electronics residue and odor thresholds
Pharmaceutical (USP/EP)	Compendial monograph limits	Documentation and compendial identity, for licensed manufacture
Electronic	Very low metals, particles and non-volatile residue	Surface contamination in wafer and PCB cleaning

Properties and handling

Property	Value	Consequence
Formula / molecular weight	C3H8O / 60.10	Small, polar molecule – it penetrates and evaporates quickly
Miscibility with water	Complete	Used as a coupling solvent and as a drying agent for wet surfaces
Water azeotrope	About 87.7% IPA with water, boiling near 80 deg C	Why a 0.10% water limit requires azeotropic distillation or molecular sieve drying rather than simple distillation
Flash point	About 12 deg C	Flammable liquid – storage, bonding and earthing requirements apply
Evaporation rate	Fast	Good for cleaning and drying; causes chill and rapid concentration changes in open vessels

Applications

Sector	Function
Coatings and inks	Solvent for resins, and a tail solvent that controls drying and flow
Electronics	Cleaning and drying of assemblies and surfaces where residue is unacceptable
Pharmaceutical	Extraction, crystallisation and processing solvent; cleaning agent
Chemical synthesis	Solvent and intermediate, notably for acetone and isopropylamines
Personal care	Solvent and carrier in fragrance, hand gels and hair products
General industrial	Degreasing, surface preparation, laboratory solvent

Packaging, storage and documentation

Item	Detail
Packaging	160 kg drums, IBC and bulk road tanker
Storage	Cool, dry, well ventilated, away from ignition sources and oxidisers. Keep containers closed – IPA absorbs atmospheric moisture and will drift out of the 0.10% water specification in a humid store
Transport	Flammable liquid; classification and packing per the applicable transport regulations
Documentation	Batch COA (purity, water, acidity, residue, carbonyl, sulfide, colour) plus SDS