What is Sodium Chromate Tetrahydrate?
Sodium Chromate Tetrahydrate (Na2CrO4.4H2O) is the hydrated crystalline form of sodium chromate, a hexavalent chromium compound that is more commonly available and stable in this hydrate form compared to anhydrous sodium chromate at typical ambient conditions. It is a yellow crystalline solid that has been historically used across various industrial applications taking advantage of chromium's specific oxidising and corrosion-inhibiting chemistry, though its use is subject to increasing regulatory scrutiny in many jurisdictions due to the recognised health hazards associated with hexavalent chromium compounds.
Polychem Industries supplies Sodium Chromate Tetrahydrate to industrial chemical companies for specific, regulated applications across India and internationally, distinct from our standard anhydrous Sodium Chromate product. Given the regulatory complexity surrounding hexavalent chromium compounds, we work closely with customers to ensure appropriate handling, documentation, and compliance for their specific application and jurisdiction.
Hexavalent Chromium Safety Notice
Sodium Chromate contains hexavalent chromium (Cr6+), a substance subject to strict regulatory controls in many jurisdictions due to its classified health hazards. Handle only with appropriate PPE, engineering controls, and in full compliance with applicable workplace safety and environmental regulations. Full MSDS documentation must be reviewed before handling. Contact us to confirm current regulatory status and handling requirements for your specific use case and region.
Available Grades
| Grade | Form | Purity | Standard | Applications |
|---|---|---|---|---|
| Industrial Grade | Yellow crystalline powder/granules | 98%+ (Industrial Grade) | Industrial | Corrosion inhibition, pigments, leather tanning, chemical synthesis |
Applications & Uses
Corrosion Inhibition
Historically used as a corrosion inhibitor in certain industrial water treatment and metal protection applications, taking advantage of chromate's strong passivating effect on metal surfaces, though use has declined significantly due to regulatory restrictions on hexavalent chromium.
Pigment Production
Used as a raw material in the production of certain chromium-based pigments, contributing to specific colour and performance characteristics in specialty pigment applications.
Chemical Synthesis & Oxidation Reactions
Used as an oxidising agent and chemical intermediate in various specialty chemical synthesis processes requiring chromate chemistry, within applicable regulatory frameworks.
Leather Tanning (Specialty Applications)
Historically used in certain specialty leather tanning processes, though largely superseded by alternative tanning chemistries in most modern leather production due to environmental and regulatory considerations.
Electroplating & Surface Treatment
Used in certain specialty electroplating and metal surface treatment applications requiring chromate chemistry, subject to applicable regulatory frameworks governing hexavalent chromium use.
Laboratory & Analytical Applications
Used as a laboratory reagent in certain analytical chemistry procedures requiring chromate-specific reactivity, typically in controlled laboratory settings with appropriate safety protocols.
Technical Specifications
Sodium Chromate Tetrahydrate — Key Properties
Why Source Sodium Chromate Tetrahydrate from Polychem Industries?
- Industrial grade with full quality documentation
- Certificate of Analysis and MSDS provided on request
- Regulatory compliance guidance available for hexavalent chromium handling
- Reliable supply for specialty industrial chemical applications
- Competitive pricing with consistent availability
- Export documentation experience, subject to destination market regulations
