Potassium dichromate
- CAS Number
- 7778-50-9
- HSN Code
- 28415090
- Molecular Formula
- K2Cr2O7
- Catalogue Number
- AL1237A
- Purity
- 99.9%
- 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 (K2Cr2O7) is a highly soluble, orange-red crystalline solid that serves as a powerful oxidizing agent. This AR-grade potassium dichromate is characterized by its exceptional purity of 99.9%, making it suitable for use as a primary standard in analytical chemistry. Its strong oxidizing properties and ability to participate in redox reactions make it invaluable in various laboratory applications. Additionally, potassium dichromate is recognized for its role in the synthesis of other chromium compounds and its use in dyeing and tanning processes.
Also known as Dichromic acid, dipotassium salt.
- Catalogue No.
- AL1237A
- CAS Number
- 7778-50-9
- Molecular Formula
- K2Cr2O7
- Molecular Weight
- 294.18 g/mol
- HSN Code
- 28415090
- Grade
- AR (Analytical Reagent)
- 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. It has a strong, characteristic odor, although it is typically handled in solid form.
- Appearance
- Orange-red crystalline solid
- Shelf Life
- 2 years
- Packaging
- Available in 100 g, 500 g, and 1 kg glass bottles
- Storage
- Store in a cool, dry place, away from incompatible materials and sources of ignition.
1.1 — Product identifier
- Chemical Name
- Potassium dichromate
- Catalogue No.
- AL1237A
- Product form
- Substance
- CAS Number
- 7778-50-9
- EC Number
- 231-906-6
- Grade
- AR
- 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
- Laboratory reagent, oxidizing agent
- 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
- Known human carcinogen, may cause respiratory irritation
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 symptoms persist, seek medical attention.
- First-aid measures after skin contact
- Wash with soap and water. Seek medical attention if irritation develops.
- 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
- Irritation of the respiratory tract, skin, and eyes; potential for serious health effects with prolonged exposure.
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
- Strong oxidizer; may cause or enhance combustion of other materials.
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. Prevent runoff from entering drains.
6.3 — Methods and material for containment and cleaning up
- Methods for cleaning up
- Collect and dispose of in accordance with local regulations. Use appropriate personal protective equipment.
6.4 — Reference to other sections
- Reference
- Not specified
7.1 — Precautions for safe handling
- Precautions for safe handling
- Avoid contact with skin and eyes. Use in a well-ventilated area. Wear appropriate PPE including gloves and goggles.
- 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 tightly closed container in a cool, dry place, 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
- Characteristic
- Odour threshold
- Not applicable
- pH value
- 4.0 (saturated solution)
- Relative evaporation rate (butylacetate=1)
- Not applicable
- Melting point
- 398 °C
- Freezing point
- Not applicable
- Boiling point
- 500 °C (decomposes)
- Flash point
- Not applicable
- Auto-ignition temperature
- Not applicable
- Decomposition temperature
- Not applicable
- Flammability (solid, gas)
- Not flammable, but a strong oxidizer
- Vapour pressure
- Negligible
- Relative vapour density at 20°C
- Not applicable
- Density
- 2.68 g/cm³
- Solubility
- 32 g/100 mL in water at 20 °C
- Log Pow
- Not applicable
- Viscosity, kinematic
- Not applicable
- Viscosity, dynamic
- Not applicable
- Explosive properties
- Not explosive
- Oxidising properties
- Strong oxidizer
- Explosive limits
- Not applicable
10.1 — Reactivity
- Reactivity
- Stable under normal conditions, but reacts violently with reducing agents.
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
- Reducing agents, organic materials, 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 reaction.
- Germ cell mutagenicity
- Not classified
- Carcinogenicity
- Not classified
- Specific target organ toxicity (single exposure)
- May cause respiratory irritation.
- 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 widely used in analytical chemistry as a primary standard for redox titrations due to its high purity and stability. It is also employed in the preparation of other chromium compounds, which are utilized in various industrial applications, including metal finishing, leather tanning, and dyeing. In addition, potassium dichromate serves as a reagent in organic synthesis and is used in the production of pigments and dyes. Its strong oxidizing properties make it useful in environmental testing and as a disinfectant in some applications.
ISO 9001
ISO 14001
GMP
COA with every batch
- Batch Number
- AL-2026-AL1237A
- Manufacturing Date
- September-2026
- Expiry Date
- September-2031
- Molecular Weight
- 294.18 g/mol
| Test | Standard | Observed |
|---|---|---|
| Assay | 99.9% | 99.95% |
| Moisture Content | <0.1% | 0.05% |
| Residue on Ignition | <0.1% | 0.03% |
| Related Substances | None detected | None detected |
| Solubility | 32 g/100 mL | 32.5 g/100 mL |
The above product is expected to comply with AR grade specification.
Technical Data Sheet
| Grade | Assay/Purity | Melting/Boiling Point | Moisture/LOD | Residue on Ignition | Related Substances | Solubility |
|---|---|---|---|---|---|---|
| AR | 99.9% | 398 °C (melting) | <0.1% | <0.1% | None detected | 32 g/100 mL in water at 20 °C |
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