Alliance Chemical 2-lb Sodium Dichromate Dihydrate in HDPE bottle with safety label, GHS hazard pictograms, and chemical
One 4-lb bottle of Alliance Chemical Sodium Dichromate with a white screw cap and product label.
One 55-lb bag of Alliance Chemical Sodium Dichromate with product label and sealed top.
Four 55-lb bags of Alliance Chemical Sodium Dichromate Dihydrate with printed labels and sealed closures.

Sodium Dichromate

Category : Inorganic Compounds

$33.00
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$33.00
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Sodium Dichromate

$33.00
Alliance Chemical 2-lb Sodium Dichromate Dihydrate in HDPE bottle with safety label, GHS hazard pictograms, and chemical
One 4-lb bottle of Alliance Chemical Sodium Dichromate with a white screw cap and product label.
One 55-lb bag of Alliance Chemical Sodium Dichromate with product label and sealed top.
Four 55-lb bags of Alliance Chemical Sodium Dichromate Dihydrate with printed labels and sealed closures.
  • Description
  • Product Documents
  • Chemical Profile

Product Overview

Sodium Dichromate Dihydrate (Na₂Cr₂O₇·2H₂O) is a high-purity, powerful oxidizing agent supplied as a yellow-orange crystalline solid. This inorganic compound is the primary source of chromium for diverse industrial applications, offering high solubility and consistent oxidizing potential. It is essential for processes requiring precise redox reactions, including organic synthesis and surface preparation.

Commonly utilized in metal finishing and electroplating, Sodium Dichromate Dihydrate acts as a corrosion inhibitor and surface modifier. It also serves critical roles in industrial water treatment and the manufacturing of pigments and dyes. This technical-grade material is manufactured to strict specifications, ensuring low impurity levels and reliable batch-to-batch performance for demanding industrial environments.

Key Properties

  • Chemical Formula: Na₂Cr₂O₇·2H₂O
  • CAS Number: 7789-12-0
  • Grade: Dihydrate
  • Appearance: Yellow-orange crystalline solid
  • Solubility: Highly soluble in water
  • Oxidizing Strength: High
  • Molecular Weight: 298.00 g/mol

Common Applications

  • Metal Finishing & Electroplating: Used to clean metal surfaces, promote adhesion, and provide corrosion resistance in plating baths.
  • Chemical Manufacturing: Acts as a strong oxidizer in the synthesis of organic chemicals and pharmaceuticals intermediates.
  • Water Treatment: employed for corrosion control in cooling systems and heat exchangers.
  • Pigment Production: A key precursor in the manufacture of inorganic chromate pigments.
  • Leather Tanning: Facilitates the tanning process to improve durability and finish.

Safety Precautions

DANGER: Sodium Dichromate is a strong oxidizer and a known carcinogen. It is toxic if swallowed, inhaled, or absorbed through the skin. It causes severe skin burns and eye damage.

Handling requires strict adherence to safety protocols including the use of NIOSH-approved respirators, chemical-resistant gloves, goggles, and protective clothing. Use only in a chemical fume hood or well-ventilated area. Keep away from heat, sparks, and combustible materials. Store in a cool, dry, locked area in corrosion-resistant containers. Refer to the Safety Data Sheet (SDS) for comprehensive handling, storage, and emergency procedures.

Benefits

High Solubility – Dissolves readily in water for easy integration into liquid processes.
Consistent Oxidation – Provides reliable redox potential for sensitive chemical synthesis.
Industrial Grade Purity – Minimizes contaminants that could interfere with plating or treatment baths.

Related Products

Property Value
Molecular Weight 326.01 g/mol g/mol
Formula Na2Cr2O7·2H2O
Grade Dihydrate
Flash Point Not applicable
Form Solid
Solubility High water solubility, moderate organic solvent solubility
Appearance Orange-red crystalline
Melting Point 125°C °C
Boiling Point 240°C °C
Specific Gravity 1.5
Industry Industrial

Frequently Asked Questions About Sodium Dichromate

What is Sodium Dichromate and what is its chemical formula?
Sodium Dichromate is a chemical compound with the molecular formula Na2Cr2O7·2H2O, registered under CAS Number 7789-12-0 by the Chemical Abstracts Service (PubChem), with a molecular weight of 326.01 g/mol g/mol. Alliance Chemical supplies Sodium Dichromate in Dihydrate grade for laboratory, industrial, and commercial applications.
What are the physical properties of Sodium Dichromate?
According to the NIOSH Pocket Guide to Chemical Hazards, Sodium Dichromate is supplied as a solid with a orange-red crystalline appearance. It has a melting point of 125°C°C, a boiling point of 240°C°C, a flash point of Not applicable. The specific gravity is 1.5 relative to water. Solubility: High water solubility, moderate organic solvent solubility.
What grade and purity of Sodium Dichromate does Alliance Chemical offer?
Alliance Chemical offers Sodium Dichromate in Dihydrate grade. Every lot ships with a Certificate of Analysis (COA) and Safety Data Sheet (SDS) prepared in accordance with OSHA Hazard Communication Standard 29 CFR 1910.1200 and GHS Revision 7. Download SDS.
What are common industrial applications of Sodium Dichromate?
Sodium Dichromate serves a wide range of sectors, including Industrial.Alliance Chemical provides the documentation and quality certifications required for use in regulated environments.
What PPE is required when handling Sodium Dichromate?
OSHA-mandated PPE per 29 CFR 1910.132-138:Nitrile gloves (8+ mil), safety goggles, flame-resistant clothing, grounded footwear, closed-toe chemical-resistant footwear. Respiratory protection (organic vapor cartridge) required in areas exceeding PEL/TLV per 29 CFR 1910.134. Emergency eyewash station and safety shower must be accessible within 10 seconds per ANSI Z358.1. Consult the SDS available from Alliance Chemical for complete PPE requirements.
What are the storage requirements for Sodium Dichromate?
Store perOSHA 29 CFR 1910.106: Approved flammable storage cabinet, maximum 60 gallons per cabinet, grounding/bonding required. Temperature range:15-25°C. Segregate from:reducing agents, combustibles, organics. Maximum storage:2-3 years unopened.
What is the emergency spill procedure for Sodium Dichromate?
Emergency response per EPA SPCC (40 CFR 112) and OSHA 29 CFR 1910.120: (1) Alert personnel, evacuate area to 100 feet. (2) Eliminate ignition sources if flammable. (3) Don PPE per SDS Section 8. (4) Stop leak if safe; use emergency shutoffs. (5) Contain with non-combustible absorbent materials, dike with sand/earth. (6)Absorb with vermiculite or commercial spill kits. (7) Collect in DOT-approved containers, label as hazardous waste. Check 40 CFR 302.4 for Reportable Quantity. Emergency: Chemtel 1-800-255-3924 (24/7). Non-emergency: Alliance Chemical 512-365-6838.
What is the DOT shipping classification for Sodium Dichromate?
DOT Classification per 49 CFR 172.101:UN1993 (Flammable Liquid, N.O.S.), Hazard Class3 (Flammable), Packing GroupII/III. Requires: Hazmat shipping papers (49 CFR 172.200), UN specification packaging (49 CFR 173), hazmat labels (172.400). Alliance Chemical ships all orders in DOT-compliant packaging with proper documentation.
How must Sodium Dichromate waste be disposed?
Disposal per RCRA (40 CFR 261-265):Characteristic waste D001 (Ignitable, flash point <60°C). Generator requirements: EPA ID number required if >100 kg/month (40 CFR 262.12). Use EPA-permitted Treatment, Storage, Disposal Facility (TSDF). Never discharge to sewer without POTW written approval (40 CFR 403). Container disposal: Triple rinse (40 CFR 261.7), offer for reconditioning/recycling. State regulations may be more stringent — check with your local environmental agency. Consult the Alliance Chemical SDS for product-specific disposal guidance.
Does Alliance Chemical provide an SDS and COA for Sodium Dichromate?
Yes. Alliance Chemical provides a Safety Data Sheet (SDS) and Certificate of Analysis (COA) for every lot of Sodium Dichromate. The SDS is prepared in accordance with OSHA Hazard Communication Standard 29 CFR 1910.1200 and the Globally Harmonized System (GHS) Revision 7, covering all 16 required sections including hazard identification, first aid measures, firefighting measures, handling and storage, exposure controls, and regulatory information. The SDS is available for download directly from this product page. COAs are available upon request by contacting Alliance Chemical at 512-365-6838.

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