Potassium dichromate
- CAS Number
- 7778-50-9
- HSN Code
- 28415090
- Molecular Formula
- K2Cr2O7
- Catalogue Number
- AL01237
- Purity
- 99.5%
- Molecular Weight
- 294.18 g/mol
Complies with : IP | BP | USP | EP | ACS
ISO 9001
ISO 14001
GMP
COA with every batch
Key Properties
Potassium dichromate is a highly pure inorganic compound known for its strong oxidizing properties. This extra-pure grade, consisting of purified small crystals, is particularly suitable for precise research applications where high purity is essential. With a molecular formula of K2Cr2O7 and a molecular weight of 294.18 g/mol, it is widely recognized in various chemical analyses and laboratory procedures. Its notable characteristics include its vibrant orange-red color and its classification as a hazardous material due to its toxicity and carcinogenic nature, making it crucial to handle with care.
Also known as Dichromic acid, dipotassium salt.
- Catalogue No.
- AL01237
- CAS Number
- 7778-50-9
- Molecular Formula
- K2Cr2O7
- Molecular Weight
- 294.18 g/mol
- HSN Code
- 28415090
- Grade
- Extra Pure
- Product Form
- Substance
Potassium dichromate appears as an orange-red crystalline solid. It has a melting point of 398 °C and a boiling point of 500 °C (decomposes). The density of potassium dichromate is approximately 2.68 g/cm³. It is highly soluble in water, with a solubility of about 32 g/100 mL at 20 °C. The compound has a pH value of approximately 4.0 in a saturated solution, indicating its acidic nature. Its strong oxidizing properties make it reactive with various organic and inorganic substances.
- Appearance
- Orange-red crystalline solid
- Shelf Life
- -
- Packaging
- Available in various packaging options, typically in glass or plastic containers to prevent contamination.
- Storage
- Store in a cool, dry place away from incompatible materials, particularly organic substances and reducing agents.
1.1 — Product identifier
- Chemical Name
- Potassium dichromate
- Catalogue No.
- AL01237
- Product form
- Substance
- CAS Number
- 7778-50-9
- EC Number
- 231-906-6
- Grade
- Extra Pure
- EC Index Number
- Cr(IV)
- Chemical Formula
- K2Cr2O7
- HSN Code
- 28415090
- Synonyms
- Dichromic acid, dipotassium salt
1.2 — Relevant identified uses of the substance or mixture and uses advised against
- Use of the substance/mixture
- Used as an oxidizing agent in various chemical reactions and analyses.
- Uses advised against
- Not specified
1.3 — Details of the supplier of the safety data sheet
- Company identification
- Address:- 102, B wing, Savgan Heights, RTO Lane,Andheri (W), Mumbai-400 053Maharashtra, India.
1.4 — Emergency Contact Details
- Phone / e-Mail
- Phone : +91 22 26317055 Mobile : +91 9820385757 e-mail : info@alphachemika.co.in
2.3 — Other hazards
- Other hazards
- Strong oxidizer; may cause fire or explosion in contact with combustible materials.
3.1 — Substance
- Name
- Potassium dichromate
- CAS No.
- 7778-50-9
4.1 — Description of first aid measures
- First-aid measures after inhalation
- Move to fresh air. If breathing is difficult, give oxygen. Seek medical attention immediately.
- First-aid measures after skin contact
- Wash with soap and water. Remove contaminated clothing. Seek medical attention if irritation persists.
- First-aid measures after eye contact
- Rinse cautiously with water for several minutes. Remove contact lenses if present and easy to do. Continue rinsing and seek medical attention.
- First-aid measures after ingestion
- Do not induce vomiting. Rinse mouth and seek medical attention immediately.
4.2 — Most important symptoms and effects, both acute and delayed
- Symptoms relating to use
- Symptoms of exposure may include respiratory distress, skin irritation, and eye damage. Chronic exposure may lead to cancer.
4.3 — Indication of any immediate medical attention and special treatment needed
- General information
- Treat symptomatically. Show this safety data sheet to the treating physician.
5.1 — Extinguishing media
- Suitable extinguishing media
- Water spray, carbon dioxide, dry chemical powder, foam.
- Unsuitable extinguishing media
- Not specified
5.2 — Special hazards arising from the substance or mixture
- Special procedures
- May cause fire or explosion; strong oxidizer. Use water spray to cool containers exposed to fire.
5.3 — Advice for firefighters
- Protection during firefighting
- Do not enter fire area without proper protective equipment, including respiratory protection.
6.1.1 — For non-emergency personnel
- Emergency procedures
- Evacuate area and ventilate. Wear appropriate protective equipment. Contain and collect spill using inert material.
6.3 — Methods and material for containment and cleaning up
- Methods for cleaning up
- Collect spillage and place in a suitable container for disposal. Avoid release into the environment.
6.4 — Reference to other sections
- Reference
- Not specified
7.1 — Precautions for safe handling
- Precautions for safe handling
- Handle with care, using appropriate personal protective equipment (PPE) including gloves and goggles. Avoid contact with skin and eyes.
- Hygiene measures
- Wash hands and other exposed areas with mild soap and water before eating, drinking or smoking and when leaving work.
7.2 — Conditions for safe storage, including any incompatibilities
- Storage conditions
- Store in a cool, dry, well-ventilated area away from incompatible materials.
8.2 — Exposure controls
- Hand protection
- Protective gloves (e.g. nitrile rubber)
- Eye protection
- Chemical safety goggles or safety glasses
- Skin and body protection
- Wear suitable protective clothing
- Respiratory protection
- Use appropriate respiratory protection if ventilation is inadequate.
9.1 — Information on basic physical and chemical properties
- Physical state
- Solid
- Colour
- Orange-red
- Odour
- Odourless
- Odour threshold
- No data available
- pH value
- 4.0 (saturated solution)
- Relative evaporation rate (butylacetate=1)
- No data available
- Melting point
- 398 °C
- Freezing point
- No data available
- Boiling point
- 500 °C (decomposes)
- Flash point
- No data available
- Auto-ignition temperature
- No data available
- Decomposition temperature
- No data available
- Flammability (solid, gas)
- Not flammable, but a strong oxidizer
- Vapour pressure
- No data available
- Relative vapour density at 20°C
- No data available
- Density
- 2.68 g/cm³
- Solubility
- 32 g/100 mL (at 20 °C)
- Log Pow
- No data available
- Viscosity, kinematic
- No data available
- Viscosity, dynamic
- No data available
- Explosive properties
- No data available
- Oxidising properties
- Strong oxidizer
- Explosive limits
- No data available
10.1 — Reactivity
- Reactivity
- Reacts violently with reducing agents and organic materials.
10.2 — Chemical stability
- Chemical stability
- Stable under recommended storage conditions.
10.3 — Possibility of hazardous reactions
- Possibility of hazardous reactions
- No dangerous reactions known under normal conditions of use.
10.4 — Conditions to avoid
- Conditions to avoid
- Avoid contact with incompatible materials and excessive heat.
10.5 — Incompatible materials
- Incompatible materials
- Strongly reactive with organic materials, reducing agents, and acids.
10.6 — Hazardous decomposition products
- Hazardous decomposition products
- Not specified
11.1 — Information on toxicological effects
- Acute toxicity
- Toxic if swallowed, inhaled, or absorbed through skin.
- Skin corrosion/irritation
- Causes skin irritation.
- Serious eye damage/irritation
- Causes serious eye damage.
- Respiratory or skin sensitisation
- May cause allergic skin reactions.
- Germ cell mutagenicity
- Not classified
- Carcinogenicity
- Not classified
- Specific target organ toxicity (single exposure)
- May cause respiratory irritation and damage to organs through prolonged or repeated exposure.
- Specific target organ toxicity (repeated exposure)
- Not classified
12.1 — Toxicity
- Toxicity information
- Not specified
12.2 — Persistence - degradability
- Persistence - degradability
- Not specified
12.3 — Bioaccumulative potential
- Bioaccumulative potential
- Not specified
12.4 — Mobility in soil
- Mobility in soil
- Not specified
12.6 — Other adverse effects
- Environmental precautions
- Not specified
13.1 — Waste treatment methods
- Additional Info
- Dispose of contents/container in accordance with local, regional, national and international regulations.
14.1 — UN number
- UN-No. (ADR)
- 3087
- UN-No. (IMDG)
- 3087
- UN-No. (IATA)
- 3087
- UN-No. (ADN)
- 3087
- UN-No. (RID)
- 3087
14.2 — UN proper shipping name
- Proper Shipping Name (ADR)
- Potassium dichromate
- Proper Shipping Name (IMDG)
- Potassium dichromate
- Proper Shipping Name (IATA)
- Potassium dichromate
- Proper Shipping Name (ADN)
- Potassium dichromate
- Proper Shipping Name (RID)
- Potassium dichromate
14.3 — Transport hazard class(es)
- Transport hazard class(es)
- 5.1
14.4 — Packing group
- Packing group (ADR)
- II
- Packing group (IMDG)
- II
- Packing group (IATA)
- II
- Packing group (ADN)
- II
- Packing group (RID)
- II
14.5 — Environmental hazards
- Dangerous for the environment
- Not specified
- Marine pollutant
- Not specified
- Other information
- No supplementary information available
15.1 — Safety, health and environmental regulations/legislation specific for the substance or mixture
- 15.1.1 EU-Regulations
- Not specified
Potassium dichromate is extensively used in analytical chemistry as a powerful oxidizing agent. It plays a critical role in classical redox titrations, particularly in determining the concentration of reducing agents. Additionally, it is employed in Chemical Oxygen Demand (COD) testing for water quality analysis, where it helps quantify the amount of organic pollutants in water samples. Beyond laboratory applications, potassium dichromate is also utilized in the production of pigments, leather tanning, and as a corrosion inhibitor in various industrial processes.
ISO 9001
ISO 14001
GMP
COA with every batch
- Batch Number
- AL-2026-AL01237
- Manufacturing Date
- September-2026
- Expiry Date
- September-2031
- Molecular Weight
- 294.18 g/mol
| Test | Standard | Observed |
|---|---|---|
| Assay | 99.5% min | 99.7% |
| Moisture Content | <0.5% | 0.3% |
| Residue on Ignition | <0.1% | 0.05% |
| Solubility | 32 g/100 mL | 32 g/100 mL |
The above product is expected to comply with Extra Pure grade specification.
Technical Data Sheet
| Grade | Assay/Purity | Melting/Boiling Point | Moisture/LOD | Residue on Ignition | Related Substances | Solubility |
|---|---|---|---|---|---|---|
| Extra Pure | 99.5% | 398 °C | <0.5% | <0.1% | None detected | 32 g/100 mL (at 20 °C) |
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