Chemical laboratory

Sodium Dichromate Dihydrate

High-Purity Oxidizing Agent for Industrial Applications

  • CAS 7789-12-0
  • Formula Na₂Cr₂O₇·2H₂O
  • Flash Pt N/A °C
  • Density 2.52 g/cm³
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Physical & Chemical Properties

Property Value Unit
Boiling point N/A (decomposes) °C
Flash point N/A °C
Density 2.52 g/cm³ g/cm³
Solubility Very soluble in water: 237 g/100 mL (20 °C) -
Ph 3.0-4.0 (1% solution) -
Molecular weight 298.14 g/mol g/mol
Melting point N/A (decomposes) °C
Vapor pressure N/A mmHg
Autoignition temp N/A -
Appearance Red-orange crystalline solid -
Odor Odorless -
Vapor density N/A g/cm³

Overview

Sodium Dichromate Dihydrate (Na₂Cr₂O₇·2H₂O) is a red-orange crystalline inorganic compound widely used as a powerful oxidizing agent in industrial processes. With its high water solubility and strong oxidizing properties, this chemical serves critical roles in metal treatment, leather processing, and chemical manufacturing applications.

Key Applications

Our sodium dichromate dihydrate excels in multiple industrial sectors:

  • Electroplating and Metal Treatment: Essential for chromium plating processes and as a corrosion inhibitor in cooling systems and metal surface treatments
  • Leather Tanning: Widely used in chrome tanning processes to produce durable, high-quality leather products with superior strength and flexibility
  • Chemical Manufacturing: Serves as a key raw material in manufacturing other chromium compounds and as a laboratory reagent for analytical procedures
  • Wood Preservation: Functions as an effective wood preservative, protecting against fungal decay and insect damage in treated lumber

Safety & Handling

Sodium dichromate dihydrate is a hazardous oxidizing agent that requires careful handling. The compound decomposes rather than melting or boiling, eliminating traditional flash point concerns. However, proper personal protective equipment including chemical-resistant gloves, safety goggles, and respiratory protection is essential. Ensure adequate ventilation in work areas and avoid contact with reducing agents, organic materials, and combustible substances. Always follow proper decontamination procedures and waste disposal protocols.

Storage & Shelf Life

Store sodium dichromate dihydrate in a cool, dry, well-ventilated area away from incompatible materials including acids, bases, and organic compounds. Use original containers or approved chemical-resistant containers with tight-fitting lids. Maintain storage temperatures below 25°C and protect from moisture to prevent caking. Keep away from heat sources and combustible materials. When properly stored, the compound maintains stability for extended periods.

Why Alliance Chemical

Alliance Chemical provides reliable sodium dichromate dihydrate supply from our Taylor, Texas facility with same-day shipping capabilities. We offer flexible delivery options including UPS, LTL, and FTL shipping to meet your timeline requirements. Every shipment includes comprehensive Safety Data Sheets (SDS) and Certificates of Analysis (COA) for quality assurance. Contact us today to discuss your Sodium Dichromate Dihydrate requirements and experience our commitment to industrial chemical excellence.

Shipping & Availability

Parcel Shipping

UPS Ground supports pints, quarts, and most 1-gallon packages nationwide.

LTL Freight

5-gallon pails, drums, and totes move via LTL carriers such as ABF Freight, SEFL, Saia, and XPO.

Full Truckload

FTL available for palletized bulk orders. Competitive freight rates.

Local Pickup

Same-day pickup at our Taylor, TX warehouse for Texas customers.

SDS, COA, and TDS available for every product • Same-day shipping on orders before 1 PM CT

Available Sizes

Sodium Dichromate - 1 Pack (2 lbs.)

1 Pack (2 lbs.)

$36.30

 Sodium Dichromate - 1 Pack (4 lbs.)

1 Pack (4 lbs.)

$67.10

 Sodium Dichromate - 1 Pack (55 lbs.)

1 Pack (55 lbs.)

$379.50
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Frequently Asked Questions

What is sodium dichromate dihydrate and what is it used for?
Sodium dichromate dihydrate (Na2Cr2O7·2H2O) is an orange‑red, water‑soluble inorganic oxidizing salt used as a laboratory reagent and industrial oxidizer. Common uses include organic synthesis, corrosion inhibition preparation, pigment and dye manufacture, metal finishing/etching, and analytical standards.
How should sodium dichromate dihydrate be stored and what is its shelf life?
Store tightly sealed in a cool, dry, well‑ventilated area away from reducing agents, combustibles and acids; keep in corrosion‑resistant containers (e.g., HDPE or glass). The material is stable for years if kept dry and sealed, but suppliers typically recommend shelf‑life checks and confirmation by COA before critical use.
What are the main safety hazards and handling precautions for sodium dichromate dihydrate?
Sodium dichromate contains hexavalent chromium and is a strong oxidizer and confirmed human carcinogen; it is toxic by inhalation, ingestion and skin contact. Use engineering controls (local exhaust/fume hood), wear appropriate PPE (gloves, eye/face protection, lab coat, respirator if needed), avoid creating dust, and follow the product SDS for spill and exposure procedures.
How do concentration and grade differences affect use of sodium dichromate dihydrate?
Solid material is supplied in purity grades (technical, reagent, analytical) with typical purities ranging from ~95% to ≥99.5%; solutions are prepared to specified molarity for laboratory or process use (e.g., 0.1–1.0 M). Choose grade and concentration based on application requirements, and consult the COA/TDS for exact impurity and assay data.
What documentation is provided with sodium dichromate dihydrate?
Suppliers normally provide a Safety Data Sheet (SDS), Certificate of Analysis (COA), Technical Data Sheet (TDS) and regulatory information on request; additional documents (REACH, TSCA status) may be available depending on jurisdiction. Always review the SDS before handling or shipping.
How is sodium dichromate dihydrate packaged and shipped?
It is shipped as a regulated hazardous material and must be transported in compliance with local and international rules; packaging typically includes sealed bags, multi‑wall paper or polyethylene bags, and lined fiber or plastic drums. Consult the SDS and your carrier for required labeling, placarding, and transport documentation.
What materials is sodium dichromate dihydrate compatible or incompatible with?
Compatible container materials include glass and corrosion‑resistant plastics (e.g., HDPE, polypropylene); avoid contact with reducing agents, organic materials, combustibles, and strong acids or bases. Segregate from incompatible substances and use appropriate secondary containment.
What are the key technical specifications for sodium dichromate dihydrate?
Typical specifications include formula Na2Cr2O7·2H2O, molar mass ≈ 298 g·mol⁻¹, orange‑red crystalline solid, water‑soluble and a strong oxidizer; available in various purity grades (e.g., 95–99.5%+). Exact physical, chemical and impurity data are provided on the COA and TDS for each batch.
Which industries and applications commonly use sodium dichromate dihydrate?
It is used in chemical manufacturing, metal finishing and etching, pigments and dyes production, corrosion inhibitor synthesis, laboratory analytical chemistry and research. Due to its toxicity and regulatory controls, use is generally limited to industrial and controlled laboratory settings.
How can I purchase sodium dichromate dihydrate and are there regulatory restrictions?
Sodium dichromate dihydrate is available from chemical suppliers in multiple grades and packaging sizes; purchasing may require business credentials, chemical use justification and compliance with local hazardous‑chemical regulations. Check supplier ordering policies and confirm any export controls, licensing or handling restrictions prior to purchase.

Documentation & Downloads

Safety Data Sheet
SDS / MSDS
Request COA
Certificate of Analysis
Technical Data Sheet (TDS)
Available for all products

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