Dipotassium;dioxido(dioxo)chromium

CrK2O4

dipotassium;dioxido(dioxo)chromium

CAS7789-00-6
GHS08 Gefahrensymbol: Gesundheitsgefahr – Gesundheitsgefahr
GHS07 Gefahrensymbol: Gesundheitsschädlich/Reizend – Ausrufezeichen
GHS09 Gefahrensymbol: Umweltgefährlich – Umwelt
Danger

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Identification

CAS Number
7789-00-6
EC Number
232-140-5
UN Number
3288
Index Number
024-006-00-8
PubChem CID
24597

Physical-chemical properties

Molecular Formula
CrK2O4
Molar Mass
194.19 g/mol
IUPAC Name
dipotassium;dioxido(dioxo)chromium

Chemical Identifiers

InChI
InChI=1S/Cr.2K.4O/q;2*+1;;;2*-1
InChI Key
XMXNVYPJWBTAHN-UHFFFAOYSA-N

Overview

Dipotassium;dioxido(dioxo)chromium (CAS 7789-00-6) is an inorganic chromate compound with strong oxidizing properties and significant toxicological hazards. This potassium chromate salt, with the molecular formula CrK2O4 and molar mass of 194.19 g/mol, represents a critical industrial chemical compound widely utilized across various technical applications. The substance is characterized by its distinctive yellow crystalline appearance and high solubility in water, making it particularly valuable in electrochemical and surface treatment processes. As a hexavalent chromium compound, it exhibits powerful oxidizing characteristics that are essential for numerous industrial transformations. The safety profile of this chromate compound requires particular attention due to its classification under multiple hazard categories. The substance carries a Danger signal word with GHS08, GHS07, and GHS09 pictograms, indicating serious health and environmental risks. It is classified as a Category 1B carcinogen and mutagen, presenting significant occupational health considerations that demand strict handling protocols and protective measures. Additional hazard classifications include skin and eye irritation properties, skin sensitization potential, and acute aquatic toxicity, necessitating comprehensive risk management strategies in industrial environments. Primary industrial applications include electroplating processes, where its oxidizing properties facilitate metal surface preparation and finishing. The compound serves as a crucial component in analytical chemistry applications and certain pigment manufacturing processes. In leather tanning operations, it functions as a chromium source, though environmental regulations increasingly limit such applications due to toxicological concerns. Unlike other industrial chemicals such as benzene-1,3-diol which serves primarily as a chemical intermediate, dipotassium chromate's applications are more specialized due to its unique oxidizing characteristics and regulatory restrictions. OYSI maintains availability of this technical-grade chromate compound for qualified industrial customers with appropriate handling capabilities.

Safety & Classification

Danger
Classification:

Carc. 1B; Muta. 1B; STOT SE 3; Skin Irrit. 2; Eye Irrit. 2; Skin Sens. 1; Aquatic Acute 1; Aquati...

HHazard Statements (H-Statements)

Describe the nature and severity of the hazard

H340

May cause genetic defects.

H335

May cause respiratory irritation.

H315

Causes skin irritation.

H319

Causes serious eye irritation.

H317

May cause an allergic skin reaction.

H400

Very toxic to aquatic life.

H410

Very toxic to aquatic life with long lasting effects.

Classification according to CLP Regulation (EC) No 1272/2008. The complete list of hazard and precautionary statements can be found in the Safety Data Sheet (SDS).

First Aid Measures

Inhalation

Irritant

Measures if vapours or dust are inhaled

First Aid Actions

  • +P304IF INHALED:
  • +P340Remove person to fresh air and keep comfortable for breathing.
  • +P311Call a POISON CENTER/doctor.

Related hazard statements:

Skin Contact

Irritant

Measures if substance contacts the skin

First Aid Actions

  • +P302IF ON SKIN:
  • +P352Wash with plenty of water.
  • +P361Take off immediately all contaminated clothing.
  • +P313Get medical advice/attention.

Related hazard statements:

Eye Contact

Irritant

Measures if substance gets into the eyes

First Aid Actions

  • +P305IF IN EYES:
  • +P351Rinse cautiously with water for several minutes.
  • +P338Remove contact lenses, if present and easy to do. Continue rinsing.
  • +P313Get medical advice/attention.

Related hazard statements:

General Measures

Emergency 112 | Poison Control: +49 30 19240 (DE), +33 1 45 42 59 59 (FR), +31 30 274 88 88 (NL)

First aid measures are based on CLP classification and associated P-statements. They do not replace the Safety Data Sheet (SDS). In case of emergency, always consult the full SDS and a physician.

Transport (ADR)

UN Number3288
ADR Class6.1
Packing GroupII
Tunnel CodeD/E
Proper Shipping NameKaliumchromat
Marine PollutantNo

Frequently Asked Questions

What is dipotassium;dioxido(dioxo)chromium?

Dipotassium;dioxido(dioxo)chromium is a chromium-based inorganic compound with the molecular formula CrK2O4 and CAS number 7789-00-6. This substance has a molecular weight of 194.19 g/mol and is classified as a hazardous chemical with multiple health and environmental concerns. It is categorized as a Category 1B carcinogen and mutagen, requiring strict safety protocols during handling and use in industrial applications.

What are the physicochemical properties of dipotassium;dioxido(dioxo)chromium?

Dipotassium;dioxido(dioxo)chromium is a crystalline inorganic salt with the chemical formula CrK2O4. As a chromium(VI) compound, it typically appears as orange to yellow crystals and is highly soluble in water. The compound has a molecular weight of 194.19 g/mol and exhibits strong oxidizing properties. Its high water solubility makes it readily bioavailable, contributing to its significant health hazards.

What is dipotassium;dioxido(dioxo)chromium used for?

Dipotassium;dioxido(dioxo)chromium is primarily used as an oxidizing agent in analytical chemistry and industrial processes. It serves as a laboratory reagent for chemical analysis and synthesis reactions. Due to its carcinogenic and mutagenic properties, its applications are strictly regulated and limited to specialized industrial processes where proper safety controls can be implemented to protect workers and the environment.

How to handle dipotassium;dioxido(dioxo)chromium safely?

Dipotassium;dioxido(dioxo)chromium requires extreme caution during handling due to its carcinogenic and mutagenic properties. Essential safety measures include wearing appropriate personal protective equipment (PPE) such as chemical-resistant gloves, safety goggles, and respiratory protection. Work should be conducted in well-ventilated areas or under fume hoods. Avoid skin and eye contact, and prevent inhalation of dust or vapors to minimize health risks.

How to store dipotassium;dioxido(dioxo)chromium correctly?

Dipotassium;dioxido(dioxo)chromium should be stored in tightly sealed containers in a cool, dry, well-ventilated area away from incompatible materials. As an oxidizing agent, keep it separated from reducing agents, organic materials, and combustible substances. Store in original packaging with proper labeling and ensure containers are made of compatible materials. Access should be restricted to trained personnel only due to its hazardous nature.

What to do in case of contact with dipotassium;dioxido(dioxo)chromium?

Immediate action is required in case of contact with dipotassium;dioxido(dioxo)chromium. For skin contact, remove contaminated clothing and flush the affected area with plenty of water for at least 15 minutes. In case of eye contact, rinse thoroughly with water and seek immediate medical attention. If inhaled, move to fresh air immediately. For ingestion, do not induce vomiting and seek urgent medical care. Always consult a physician after any exposure.

How to dispose of dipotassium;dioxido(dioxo)chromium properly?

Dipotassium;dioxido(dioxo)chromium must be disposed of as hazardous waste in accordance with local and national regulations. The substance cannot be disposed of in regular waste streams due to its carcinogenic properties and environmental toxicity. Contact licensed hazardous waste disposal companies for proper collection and treatment. Never discharge into drains, soil, or water bodies as it poses significant environmental risks to aquatic life.

How to transport dipotassium;dioxido(dioxo)chromium?

Dipotassium;dioxido(dioxo)chromium is classified under ADR Class 6.1 (toxic substances), Packing Group II, indicating high toxicity requiring specific transport protocols. It must be packaged in UN-approved containers with proper hazard labels and documentation. Transport vehicles must carry appropriate emergency equipment and drivers require hazardous materials certification. Shipping documents must include proper shipping names, UN numbers, and emergency contact information.

Is dipotassium;dioxido(dioxo)chromium subject to specific regulations?

Dipotassium;dioxido(dioxo)chromium is subject to extensive regulatory oversight under REACH, CLP, and other chemical safety regulations. As a Category 1B carcinogen and mutagen, it requires authorization for many uses within the EU. Companies must comply with strict registration requirements, safety data sheet provisions, and worker protection measures. Its classification under multiple hazard categories necessitates comprehensive risk assessments and safety protocols.

Where to buy dipotassium;dioxido(dioxo)chromium in Europe?

OYSI is a reliable European distributor for dipotassium;dioxido(dioxo)chromium, providing this specialized chemical to qualified industrial customers. As a professional chemical distributor, OYSI ensures proper documentation, safety data sheets, and regulatory compliance for this hazardous substance. Due to its restricted nature and safety requirements, purchases are limited to qualified industrial users with appropriate handling capabilities and regulatory permissions.

Data Sources

Classification per CLP Regulation (EC) No 1272/2008. Data from ECHA and PubChem.