Potassium Chromate

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Potassium Chromate is an inorganic chemical compound and a bright yellow crystalline solid commonly used as an oxidizing agent and pigment. It serves as a source of chromate ions in various chemical, industrial, and laboratory applications. Due to its toxic and carcinogenic nature, careful handling and strict regulatory compliance are essential. Potassium Chromate is widely used in corrosion inhibition, dyeing, and chemical synthesis processes.

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Category: Industrial Additives Tags: Analytical Reagent, Inorganic Chromate Salt, K₂CrO₄, Potassium Chromate, Yellow Chemical Compound

Description

Table of Contents

Potassium Chromate

Primary Uses

Chemical Industry

Used as an oxidizing agent in organic synthesis and analytical chemistry.
Serves as a key reagent in qualitative and quantitative chemical analyses, including detection of chloride ions.
Acts as a corrosion inhibitor in cooling systems and metal finishing baths.

Pigments and Dyes

Used in the production of yellow pigments for paints, inks, and dyes.
Employed in leather tanning to improve color fastness and durability.

Electroplating

Used in chromium plating baths to enhance plating quality and uniformity.
Serves as an additive in electroplating processes for metals.

Secondary Uses

Wood Preservation

Utilized in wood treatment formulations to prevent fungal decay and insect damage.

Photography

Employed in photographic processes as a sensitizer and in photoengraving.

Laboratory Reagent

Used as a reagent for chemical tests, including the Mohr method for chloride determination.

Textile Industry

Used in dyeing and printing textiles to improve color fixation and brightness.

KEY PRODUCT FEATURES

1. Basic Identification Attributes

Chemical Name (IUPAC): Potassium chromate
Common/Trade Name: Potassium Chromate
CAS Number: 7789-00-6
HS Code: 2833.11 (Chromates)
Synonyms: K₂CrO₄; chromate of potassium

2. Physical & Chemical Properties

Physical State: Solid, crystalline powder or granules
Color & Odor: Bright yellow; odorless
Solubility: Highly soluble in water (about 57 g/100 mL at 20°C)
Melting Point: 975°C (decomposes)
Density: ~2.7 g/cm³
Stability: Stable under normal conditions; strong oxidizer

3. Safety & Hazard Attributes

GHS Classification: Carcinogenic (Category 1B), Mutagenic (Category 2), Toxic to aquatic life
Toxicity: Highly toxic and carcinogenic; harmful if inhaled, ingested, or absorbed through skin
Exposure Limits: Strict limits; avoid any exposure; use in well-ventilated environments with protective equipment

4. Storage & Handling Attributes

Storage Conditions: Store in tightly sealed containers, in a cool, dry, and well-ventilated area away from incompatible materials
Container Type: Glass or plastic containers resistant to strong oxidizers
Shelf Life: Typically 1–3 years if stored properly
Handling Precautions: Use full PPE including gloves, respirators, and protective clothing; avoid dust generation and skin contact

5. Regulatory & Compliance Attributes

Complies with hazardous chemical regulations including OSHA, REACH, and local environmental laws
Classified as a hazardous substance requiring specialized transport and storage

6. Environmental & Health Impact

Biodegradability: Not biodegradable
Ecotoxicity: Extremely toxic to aquatic organisms; avoid environmental release
Bioaccumulation: Potential for bioaccumulation in aquatic organisms

SAFETY HANDLING PRECAUTIONS

Safety Handling Precautions

PPE Required: Full protective gloves, goggles, respirators, and protective clothing mandatory
Handling Guidelines: Handle in fume hoods or well-ventilated areas; prevent dust formation; do not inhale or ingest
Storage Measures: Store securely to prevent leaks and spills; isolate from reducing agents and organic materials

First Aid Measures

Inhalation: Move to fresh air immediately; seek urgent medical attention for respiratory distress
Skin Contact: Remove contaminated clothing; wash skin thoroughly with soap and water; seek medical help for burns or irritation
Eye Contact: Rinse eyes with water for at least 15 minutes; seek immediate medical assistance
Ingestion: Do not induce vomiting; rinse mouth; seek emergency medical treatment immediately

Firefighting Measures

Fire Hazards: Strong oxidizer; can intensify fire and cause explosions if mixed with combustible materials
Extinguishing Media: Use water spray or fog; do not use dry chemical or CO₂ alone
Special Precautions: Firefighters must wear full protective gear and self-contained breathing apparatus
Hazardous Combustion Products: May produce toxic chromium oxides and potassium oxides