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Potassium dichromate

Potassium dichromate

Potassium dichromate

Potassium dichromate, available grades: ≥99.8% (Analytical Reagent, Guaranteed Reagent), Primary Standard, High-Purity ≥98%, Industrial, 0.025–0.5 mol/L standard. A Class 5.1/6.1 oxidizing substance (UN 3087, PG II); burn/explosion risk with combustibles, organics, reducing agents, sulfur/phosphorus and metal powders; hexavalent chromium — fatal if swallowed, carcinogenic, mutagenic, reprotoxic; very toxic to aquatic life (H410). Used as a redox titration primary standard; in tanning, pigments, matches, plating passivation and glass/ceramic colouring.

OEM supported. Custom purity & specifications available, please contact our manager.

Hazard Class:Class 5.1 (Oxidizing; subsidiary 6.1)
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Specifications

CAS Number7778-50-9Molecular FormulaK2Cr2O7
Molecular Weight294.19AppearanceOrange-red triclinic crystals or crystalline powder with a metallic lustre, soluble in water to give an orange-red solution; a strong oxidizer, highly toxic and carcinogenic
HS Code2841.50UN Number3087
Density2.676 at 77 °F (USCG, 1999) - Denser than water; will sinkBoiling PointDecomposes at 932 °F (NTP, 1992)
Melting Point748 °F (NTP, 1992)Flash PointN/A
OriginChinaVapor PressureN/A
Solubility10 to 50 mg/mL at 68 °F (NTP, 1992)Storage ConditionCool, dry, well-ventilated place, away from combustibles, reducing agents and acids
Packaging500 g / 25 kg / 200 kg / 1 tShelf Life6-24 months
GradeAnalytical Reagent (AR) / Guaranteed Reagent (GR) / Primary Standard (PT) 99.95–100.05% / Industrial Grade / High-Purity Reagent / Analytical Standard 0.025–0.5 mol/L standard solutionsEINECS231-906-6
MDLN/AChina Customs Code2841500000
GHS ClassificationDanger: H272; H301; H312; H314; H317; H330; H334; H340; H350; H360FD; H372; H410Hazard ClassClass 5.1 (Oxidizing; subsidiary 6.1)
CategoryExplosive PrecursorsUpdated2026-09-12

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Frequently asked questions about Potassium dichromate

What is Potassium dichromate? What is its CAS number?

Potassium dichromate is an industrial chemical raw material. Its CAS number is 7778-50-9. Its molecular formula is K2Cr2O7, with a molecular weight of 294.19. Typical appearance: Orange-red triclinic crystals or crystalline powder with a metallic lustre, soluble in water to give an orange-red solution; a strong oxidizer, highly toxic and carcinogenic.

What are the synonyms and registry numbers of Potassium dichromate?

Potassium dichromate (CAS 7778-50-9) is listed under the following identifiers. EINECS number: 231-906-6.

What documents are provided with Potassium dichromate (CAS 7778-50-9)?

A Certificate of Analysis (COA) is issued for each batch of Potassium dichromate. Standard purity grade: Analytical Grade. Safety Data Sheet (MSDS/SDS) and technical data sheet are available on request before ordering.

Is Potassium dichromate classified as dangerous goods? Which UN number applies?

Transport of Potassium dichromate (CAS 7778-50-9) is arranged according to its hazardous classification. UN number: 3087. GHS hazard statements: H272, H301, H312, H314. We ship under IMDG (sea), IATA (air) or ADR (road) rules with compliant UN packaging; the final classification is confirmed against the batch test report.

What are the typical physical and chemical properties of Potassium dichromate?

Typical properties of Potassium dichromate (CAS 7778-50-9): appearance Orange-red triclinic crystals or crystalline powder with a metallic lustre, soluble in water to give an orange-red solution; a strong oxidizer, highly toxic and carcinogenic; density 2.676 at 77 °F (USCG, 1999) - Denser than water; will sink; melting point 748 °F (NTP, 1992); boiling point Decomposes at 932 °F (NTP, 1992); solubility 10 to 50 mg/mL at 68 °F (NTP, 1992). These are reference values, not a batch specification.

What is the HS code for Potassium dichromate?

The HS code for Potassium dichromate (CAS 7778-50-9) is 2841.50. Customs classification may differ by destination country, so please confirm the final code with us before ordering.
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