Description

Sodium Chromate Tetrahydrate is an inorganic salt widely utilized as a key intermediate and oxidizing agent in industrial chemistry. Its primary value lies in its role as a precursor for other chromium compounds and its strong oxidizing properties in various synthesis and treatment processes. This chemical is essential for manufacturers and laboratories in sectors such as metal finishing, corrosion inhibition, and pigment production, where consistent quality and reliable supply are critical.

Application

• Corrosion Inhibitor: A key component in cooling water treatment systems and antifreeze formulations to protect metal surfaces.
• Oxidizing Agent: Used in organic synthesis and as a laboratory reagent for various oxidation reactions.
• Pigment & Dye Intermediate: Serves as a precursor in the manufacture of chrome-based pigments and dyes.
• Metal Finishing: Employed in electroplating baths and surface treatment processes for metals.
• Wood Preservative: Used in formulations to protect timber from fungal decay and insect damage.
• Laboratory Reagent: Applied in analytical chemistry for titration and as a standard in various test methods.
• Textile Mordant: Acts as a fixing agent for dyes on fabrics to improve color fastness.
• Drilling Mud Additive: Used in the oil and gas industry to control clay swelling and fluid loss.

Basic Information

Product Name	Sodium Chromate Tetrahydrate
CAS No.	10034-82-9
Molecular Formula	Na2CrO4 · 4H2O
Molecular Weight	234.03 g/mol
Synonyms	Chromic acid, disodium salt, tetrahydrate; Sodium chromate(VI) tetrahydrate; Disodium chromate tetrahydrate; Chromium sodium oxide tetrahydrate; Natriumchromat-tetrahydrat; Caswell No. 755; CCRIS 6651
EINECS	233-140-5

Quality Control

Our Sodium Chromate Tetrahydrate is manufactured under strict quality management systems to ensure batch-to-batch consistency and reliability. Each lot undergoes rigorous analytical testing, including assay, impurity profiling, and confirmation of physical properties. A Certificate of Analysis (COA) detailing all test results is provided with every shipment to support your quality assurance protocols.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area away from incompatible materials. This product is hygroscopic (moisture-sensitive) and should be kept in a low-humidity environment. Recommended storage temperature is 15-25°C.

Specification

Item	Specification
Appearance	Yellow crystalline powder
Identification (IR)	Conforms
Assay (Na2CrO4·4H2O)	≥ 98.0 %
pH (5% solution)	8.0 - 10.0
Insoluble Matter	≤ 0.01 %
Chloride (Cl)	≤ 0.005 %
Sulfate (SO4)	≤ 0.01 %
Heavy Metals (as Pb)	≤ 0.001 %

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.