Potassium dichromate
- CAS Number
- 7778-50-9
- HSN Code
- 28415090
- Molecular Formula
- K2Cr2O7
- Catalogue Number
- AL3682
- Purity
- ≥ 98%
- 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 potassium salt that is the dipotassium salt of dichromic acid. It has a role as a sensitiser, an allergen and an oxidising agent.
Also known as Potassium bichromate.
- Catalogue No.
- AL3682
- CAS Number
- 7778-50-9
- Molecular Formula
- K2Cr2O7
- Molecular Weight
- 294.18 g/mol
- HSN Code
- 28415090
- Grade
- 98% Practical
- Product Form
- Substance
Melting point: 398 °C; Boiling point: Decomposes at about 500 °C; Density: 2.676 at 25 °C/4 °C; Solubility: In water, 45,000 mg/L at 25 °C.
- Appearance
- Orange-red triclinic crystals
- Shelf Life
- 2 years
- Packaging
- Available in: 500 gm plastic bottle, 5 Kg plastic container
- Storage
- Provision to contain effluent from fire extinguishing. Separated from combustible substances, reducing agents and food and feedstuffs. Well closed. Store in an area without drain or sewer access.
1.1 — Product identifier
- Chemical Name
- Potassium dichromate
- Catalogue No.
- AL3682
- Product form
- Substance
- CAS Number
- 7778-50-9
- EC Number
- 231-906-6
- Grade
- 98% Practical
- EC Index Number
- Cr(IV)
- Chemical Formula
- K2Cr2O7
- HSN Code
- 28415090
- Synonyms
- Potassium bichromate
1.2 — Relevant identified uses of the substance or mixture and uses advised against
- Use of the substance/mixture
- Strong oxidizing agent, analytical reagent
- 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
2.1 — Classification of the substance or mixture
- Classification according to Regulation (EC) No 1272/2008
- Ox. Sol. 2; Acute Tox. 3; Acute Tox. 4; Skin Corr. 1A; Skin Sens. 1; Acute Tox. 2; Resp. Sens. 1; Muta. 1B; Carc. 1A; Repr. 1B; STOT RE 1; Aquatic Acute 1; Aquatic Chronic 1
- Classification source
- ECHA C&L Inventory via PubChem CID 24502 - hazard classes notified by at least 50% of companies; pictograms and signal word derived from those statements
2.2 — Label elements
- Hazard pictograms
- Oxidizer, Corrosive, Acute Toxic, Health Hazard, Environmental Hazard
- Signal word
- Danger
- Hazard statements
- H272: May intensify fire; oxidizer; H301: Toxic if swallowed; H312: Harmful in contact with skin; H314: Causes severe skin burns and eye damage; H317: May cause an allergic skin reaction; H330: Fatal if inhaled; H334: May cause allergy or asthma symptoms or breathing difficulties if inhaled; H340: May cause genetic defects; H350: May cause cancer; H360: May damage fertility or the unborn child; H372: Causes damage to organs through prolonged or repeated exposure; H400: Very toxic to aquatic life; H410: Very toxic to aquatic life with long lasting effects
2.3 — Other hazards
- Other hazards
- Known human carcinogen, potential reproductive toxicity
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
- IMMEDIATELY flood affected skin with water while removing and isolating all contaminated clothing. Gently wash all affected skin areas thoroughly with soap and water.
- First-aid measures after eye contact
- First check the victim for contact lenses and remove if present. Flush victim's eyes with water or normal saline solution for 20 to 30 minutes while simultaneously calling a hospital or poison control center.
- 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 irritation, eye damage, and potential carcinogenic effects.
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
- Use water spray, alcohol-resistant foam, dry chemical or carbon dioxide.
- 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. Use appropriate protective equipment.
6.3 — Methods and material for containment and cleaning up
- Methods for cleaning up
- Personal protection: complete protective clothing including self-contained breathing apparatus. Sweep spilled substance into covered non-combustible containers. If appropriate, moisten first to prevent dusting. Carefully collect remainder.
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 appropriate personal protective equipment (PPE).
- 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
- Provision to contain effluent from fire extinguishing. Separated from combustible substances, reducing agents and food and feedstuffs. Well closed. Store in an area without drain or sewer access.
8.2 — Exposure controls
- Hand protection
- Handle with gloves.
- Eye protection
- Face shield and safety glasses. Use equipment for eye protection tested and approved under appropriate government standards such as NIOSH (US) or EN 166(EU).
- Skin and body protection
- Wear suitable protective clothing
- Respiratory protection
- Use a NIOSH-approved respirator if exposure limits are exceeded.
9.1 — Information on basic physical and chemical properties
- Physical state
- Solid
- Colour
- Orange-red
- Odour
- Odorless, no distinctive odor
- 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
- Decomposes at about 500 °C
- Flash point
- Not applicable
- Auto-ignition temperature
- Not applicable
- Decomposition temperature
- 500 °C
- Flammability (solid, gas)
- Not flammable, but a strong oxidizer
- Vapour pressure
- Negligible
- Relative vapour density at 20°C
- Not applicable
- Density
- 2.676 at 25 °C/4 °C
- Solubility
- In water, 45,000 mg/L at 25 °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
- The substance is a strong oxidant. It reacts with combustible and reducing materials. The solution in water is a weak acid.
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
- When heated to decomposition it emits toxic fumes of potassium oxide.
11.1 — Information on toxicological effects
- Acute toxicity
- LD50 Mouse oral 190 mg/kg; LD50 Mouse ip 37 mg/kg
- Skin corrosion/irritation
- H314: Causes severe skin burns and eye damage
- Serious eye damage/irritation
- Not classified (based on available data)
- Respiratory or skin sensitisation
- H317: May cause an allergic skin reaction; H334: May cause allergy or asthma symptoms or breathing difficulties if inhaled
- Germ cell mutagenicity
- H340: May cause genetic defects
- Carcinogenicity
- H350: May cause cancer
- Specific target organ toxicity (single exposure)
- Not classified (based on available data)
- Specific target organ toxicity (repeated exposure)
- H372: Causes damage to organs through prolonged or repeated exposure
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 (6.1)
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 primarily used as an oxidizing reagent in chemical analysis, particularly in COD (chemical oxygen demand) testing for water quality assessment. It is also employed in classical redox titration research, where it serves as a standard solution for determining the concentration of reducing agents. Additionally, this compound finds applications in the leather tanning industry, dyeing processes, and as a corrosion inhibitor in various industrial settings. Its strong oxidizing properties make it valuable in the synthesis of other chemicals and in laboratory experiments.
ISO 9001
ISO 14001
GMP
COA with every batch
- Batch Number
- AL-2026-AL01236
- Manufacturing Date
- September-2026
- Expiry Date
- September-2031
- Molecular Weight
- 294.18 g/mol
| Test | Standard | Observed |
|---|---|---|
| Assay | ≥ 98% | 99.5% |
| Moisture Content | ≤ 0.5% | 0.3% |
| Residue on Ignition | ≤ 0.1% | 0.05% |
| Related Substances | None detected | None detected |
| Solubility | Soluble in water | Soluble |
The above product is expected to comply with 98% Practical grade specification.
Technical Data Sheet
| Grade | Assay/Purity | Melting/Boiling Point | Moisture/LOD | Residue on Ignition | Related Substances | Solubility |
|---|---|---|---|---|---|---|
| 98% Practical | ≥ 98% | m.p. 398 °C; b.p. Decomposes at about 500 °C | ≤ 0.5% | ≤ 0.1% | None detected | In water, 45,000 mg/L at 25 °C |
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