Chromium Trioxide
- CAS Number
- 1333-82-0
- HSN Code
- 28191000
- Molecular Formula
- CrO3
- Catalogue Number
- AL1382
- Purity
- ≥ 99%
- Molecular Weight
- 99.99 g/mol
Complies with : IP | BP | USP | EP | ACS
ISO 9001
ISO 14001
GMP
COA with every batch
Key Properties
Chromium trioxide is a chromium oxide composed of a single chromium bound (oxidation state +6) to three oxygens; the acidic anhydride of chromic acid.
Also known as Chromic anhydride, Chromium(VI) oxide.
- Catalogue No.
- AL1382
- CAS Number
- 1333-82-0
- Molecular Formula
- CrO3
- Molecular Weight
- 99.99 g/mol
- HSN Code
- 28191000
- Grade
- 99% AR
- Product Form
- Substance
Melting point: 197 °C; Boiling point: Approximately 250 °C decomposes; Density: 2.70; Solubility: Solubility in water, 61.7 g100 cc solution at 0 °C; 67.45 g100 cc solution at 100 °C.
- Appearance
- Dark red, bipyramidal prismatic crystals, flakes or granular powder
- Shelf Life
- -
- Packaging
- Available in: 500 gm glass bottle
- Storage
- Provision to contain effluent from fire extinguishing. Separated from combustible substances, reducing agents, bases and food and feedstuffs. Well closed. Store in an area without drain or sewer access.
1.1 — Product identifier
- Chemical Name
- Chromium Trioxide
- Catalogue No.
- AL1382
- Product form
- Substance
- CAS Number
- 1333-82-0
- EC Number
- 215-607-8
- Grade
- 99% AR
- EC Index Number
- CrO3
- Chemical Formula
- CrO3
- HSN Code
- 28191000
- Synonyms
- Chromic anhydride, Chromium(VI) oxide
1.2 — Relevant identified uses of the substance or mixture and uses advised against
- Use of the substance/mixture
- Analytical 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
2.1 — Classification of the substance or mixture
- Classification according to Regulation (EC) No 1272/2008
- Ox. Sol. 1; Acute Tox. 3; Skin Corr. 1A; Skin Sens. 1; Acute Tox. 2; Resp. Sens. 1; Muta. 1B; Carc. 1A; Repr. 2; STOT RE 1; Aquatic Acute 1; Aquatic Chronic 1
- Classification source
- ECHA C&L Inventory via PubChem CID 14915 - 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
- H271: May cause fire or explosion; strong Oxidizer; H301: Toxic if swallowed; 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; H361: Suspected of damaging 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
- Strong oxidizer, highly toxic, corrosive, and a known human carcinogen.
3.1 — Substance
- Name
- Chromium Trioxide
- CAS No.
- 1333-82-0
4.1 — Description of first aid measures
- First-aid measures after inhalation
- If this chemical has been inhaled, remove the exposed person to fresh air at once. If breathing has stopped, perform artificial respiration. Keep the person warm and at rest.
- First-aid measures after skin contact
- If this chemical contacts the skin, immediately flush the contaminated skin with soap and water. If this chemical penetrates the clothing, immediately remove the clothing and flush the skin with water. If irritation persists after washing, get medical attention.
- First-aid measures after eye contact
- If this chemical contacts the eyes, immediately wash (irrigate) the eyes with large amounts of water, occasionally lifting the lower and upper lids. Get medical attention immediately.
- First-aid measures after ingestion
- If this chemical has been swallowed, get medical attention immediately.
4.2 — Most important symptoms and effects, both acute and delayed
- Symptoms relating to use
- Coughing, shortness of breath, skin irritation, eye irritation, nausea.
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
- If involved in a fire decomposes to produce chromium fumes.
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. Wear appropriate protective equipment. Contain and collect spillage.
6.3 — Methods and material for containment and cleaning up
- Methods for cleaning up
- Personal protection: complete protective clothing including self-contained breathing apparatus. Do NOT let this chemical enter the environment. Sweep spilled substance into sealable containers. If appropriate, moisten first to prevent dusting.
6.4 — Reference to other sections
- Reference
- Not specified
7.1 — Precautions for safe handling
- Precautions for safe handling
- Handle under a fume hood. Use appropriate personal protective equipment (PPE). 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
- Provision to contain effluent from fire extinguishing. Separated from combustible substances, reducing agents, bases 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
- Dark red to purple-red
- Odour
- Odorless
- Odour threshold
- No data available
- pH value
- No data available
- Relative evaporation rate (butylacetate=1)
- No data available
- Melting point
- 197 °C
- Freezing point
- No data available
- Boiling point
- Approximately 250 °C decomposes
- Flash point
- No data available
- Auto-ignition temperature
- No data available
- Decomposition temperature
- No data available
- Flammability (solid, gas)
- Non-flammable but a strong oxidizer
- Vapour pressure
- Very low
- Relative vapour density at 20°C
- No data available
- Density
- 2.70
- Solubility
- Solubility in water, 61.7 g100 cc solution at 0 °C; 67.45 g100 cc solution at 100 °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
- Decomposes above 250 °C . This produces chromic oxide and oxygen. This increases fire hazard. The substance is a strong oxidant.
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, strong acids, and bases.
10.6 — Hazardous decomposition products
- Hazardous decomposition products
- Decomposes at 250 °C to chromic oxide and oxygen.
11.1 — Information on toxicological effects
- Acute toxicity
- LD50 Rat oral 135-177 mg chromic trioxide/kg.; LD50 Rat oral 80 mg/kg; LD50 mouse oral 80-114 mg chromic trioxide/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)
- UN 1463
- UN-No. (IMDG)
- UN 1463
- UN-No. (IATA)
- UN 1463
- UN-No. (ADN)
- UN 1463
- UN-No. (RID)
- UN 1463
14.2 — UN proper shipping name
- Proper Shipping Name (ADR)
- Chromium Trioxide
- Proper Shipping Name (IMDG)
- Chromium Trioxide
- Proper Shipping Name (IATA)
- Chromium Trioxide
- Proper Shipping Name (ADN)
- Chromium Trioxide
- Proper Shipping Name (RID)
- Chromium Trioxide
14.3 — Transport hazard class(es)
- Transport hazard class(es)
- 5.1 (6.1,8)
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
Used as an analytical-grade oxidant in the Jones oxidation and other chromium(VI)-mediated organic reactions.
ISO 9001
ISO 14001
GMP
COA with every batch
- Batch Number
- AL-2026-AL00489
- Manufacturing Date
- September-2026
- Expiry Date
- September-2031
- Molecular Weight
- 99.99 g/mol
| Test | Standard | Observed |
|---|---|---|
| Purity | 99% min | 99.5% |
| Moisture Content | ≤ 0.5% | 0.3% |
| Residue on Ignition | ≤ 0.1% | 0.05% |
| Related Substances | No more than 0.5% | 0.2% |
| Solubility | Soluble in water | Complete dissolution in water |
The above product is expected to comply with 99% AR grade specification.
Technical Data Sheet
| Grade | Assay/Purity | Melting/Boiling Point | Moisture/LOD | Residue on Ignition | Related Substances | Solubility |
|---|---|---|---|---|---|---|
| 99% AR | ≥ 99% | m.p. 197 °C; b.p. Approximately 250 °C decomposes | ≤ 0.5% | ≤ 0.1% | No more than 0.5% of any single impurity | Solubility in water, 61.7 g100 cc solution at 0 °C; 67.45 g100 cc solution at 100 °C |
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