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Basic Chromium Sulfate (BCS)

Basic Chromium Sulfate (BCS)

CAS Number: 39380-78-4

Molecular Formula: CrH3O12S3

About Basic Chromium Sulfate (BCS)

Basic Chromium Sulfate (BCS) dominates domestic consumption with over 85,000 tons utilized annually, primarily as a specialized tanning agent to improve tensile strength and color retention in high-performance automotive leather upholstery and footwear manufacturing. Basic chromic sulfate demand is increasingly driven ...

Basic Chromium Sulfate (BCS) Specifications

CAS Number
39380-78-4
Molecular Formula
CrH3O12S3
Molecular Weight
165.07
IUPAC Name
chromium(3+);hydrogen sulfate
Canonical SMILES
OS(=O)(=O)[O-].OS(=O)(=O)[O-].OS(=O)(=O)[O-].[Cr+3]
InChI Key
QGLWFXMFZPIQLE-UHFFFAOYSA-K
InChI
InChI=1S/Cr.3H2O4S/c;3*1-5(2,3)4/h;3*(H2,1,2,3,4)/q+3;;;/p-3
Molecular Weight
165.07
Bulk Density
Approximately 0.8 g/mL for powdered forms (with a true solid density of roughly 1.7 g/cm³)
Melting Point
Roughly 90°C (194°F)
Odor
Entirely odorless
Water Solubility
Highly soluble in water, but entirely insoluble in alcohol
Hygroscopicity
Possesses strong hygroscopic traits, meaning it rapidly absorbs moisture from the surrounding air
Aqueous pH
Highly acidic, maintaining a pH range of 1.5 to 3.2 in a standard aqueous solution
Basicity Level
Standard commercial formulations maintain a controlled basicity of 32% to 34%, which optimises its reactive potential
Active Content
Standard industrial grades deliver an active chromium content equivalent to 24% to 26% Cr₂O₃

Leather Tanning

A crucial tanning agent widely used in the leather industry to convert raw hides into durable, soft, and stable leather

Textile Dyeing

A mordant used in dyeing processes, such as dyeing khaki cloth, to improve dye retention and fabric color fastness

Pigment Production

A raw material utilized in manufacturing chrome-based dyestuffs, green paints, varnishes, and inks

Electroplating

An ingredient employed in metal surface treatment and chromium plating to improve corrosion resistance and enhance surface properties

Basic Chromium Sulfate (BCS) FAQs

Minimum Order Quantity

25 kg (evaluation) · 1 MT (commercial)

Lead Time

3 – 5 weeks estimated

Delivery Terms

FOB*

Packaging

20 L pails, 200 L HDPE drums, 1000 L IBC

US Availability

US Facility Inventory

Documentation

US SDS · COA · TDS · Specification sheet

US Regulatory & Quality Information

TSCA status*

US SDS / HazCom*

GHS classification*

ISO 9001:2015 site*

DOT shipping classification*

FDA status*

EPA status*

California Prop 65*

Reliable US supply chain

Regulatory compliance

On-time delivery

Technical expert support

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