Pyridinium dichromate
- CAS Number
- 20039-37-6
- HSN Code
- 29333990
- Molecular Formula
- C10H10N2·H2Cr2O7
- Catalogue Number
- AL1279H
- Purity
- ≥ 98%
- Molecular Weight
- 376.20 g/mol
Complies with : IP | BP | USP | EP | ACS
ISO 9001
ISO 14001
GMP
COA with every batch
Key Properties
Pyridinium dichromate (PDC, extra pure) is a highly effective mild oxidant widely utilized in organic synthesis for selective oxidation reactions. It is particularly noted for its ability to convert primary alcohols to aldehydes and secondary alcohols to ketones, making it a valuable reagent in synthetic organic chemistry. The compound is characterized by its stability and ease of handling compared to other chromium-based oxidants, which often present greater hazards. With a purity of 98%, this extra pure grade ensures high reactivity and minimal impurities, making it suitable for sensitive applications in research and industrial settings.
Also known as PDC, Pyridinium chromate.
- Catalogue No.
- AL1279H
- CAS Number
- 20039-37-6
- Molecular Formula
- C10H10N2·H2Cr2O7
- Molecular Weight
- 376.20 g/mol
- HSN Code
- 29333990
- Grade
- 98% Extra Pure
- Product Form
- Substance
Pyridinium dichromate appears as an orange crystalline solid, which is indicative of its chromium content. It has a melting point of approximately 150 °C and is soluble in water, allowing for easy preparation of solutions for various chemical reactions. The compound has a density of about 1.5 g/cm³, which contributes to its handling characteristics in laboratory environments. Its solubility in water is significant, as it facilitates its use in aqueous reactions, although care must be taken due to its oxidizing properties.
- Appearance
- Orange crystalline solid
- Shelf Life
- 2 years
- Packaging
- Available in 100 g and 500 g glass bottles
- Storage
- Store in a cool, dry place away from incompatible materials.
1.1 — Product identifier
- Chemical Name
- Pyridinium dichromate
- Catalogue No.
- AL1279H
- Product form
- Substance
- CAS Number
- 20039-37-6
- EC Number
- 244-007-0
- Grade
- 98% Extra Pure
- EC Index Number
- Cr(IV)
- Chemical Formula
- C10H10N2·H2Cr2O7
- HSN Code
- 29333990
- Synonyms
- PDC, Pyridinium chromate
1.2 — Relevant identified uses of the substance or mixture and uses advised against
- Use of the substance/mixture
- Mild oxidant in organic synthesis
- 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
- May cause respiratory irritation; contains hexavalent chromium, a known carcinogen.
3.1 — Substance
- Name
- Pyridinium dichromate
- CAS No.
- 20039-37-6
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 systemic toxicity due to hexavalent chromium 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
- 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
- Contain and collect spillage. Dispose of in accordance with local regulations.
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 gloves and protective eyewear.
- 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 place, away from heat sources and 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 airborne concentrations exceed recommended limits.
9.1 — Information on basic physical and chemical properties
- Physical state
- Solid
- Colour
- Orange
- Odour
- Odourless
- Odour threshold
- Not applicable
- pH value
- Not applicable
- Relative evaporation rate (butylacetate=1)
- Not applicable
- Melting point
- 150 °C
- Freezing point
- Not applicable
- Boiling point
- Not applicable
- Flash point
- Not applicable
- Auto-ignition temperature
- Not applicable
- Decomposition temperature
- Not applicable
- Flammability (solid, gas)
- Flammable solid
- Vapour pressure
- Not applicable
- Relative vapour density at 20°C
- Not applicable
- Density
- 1.5 g/cm³
- Solubility
- Soluble in water
- 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; reacts 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
- Strong reducing agents, organic materials, and acids.
10.6 — Hazardous decomposition products
- Hazardous decomposition products
- Not specified
11.1 — Information on toxicological effects
- Acute toxicity
- Toxic if inhaled or ingested; may cause skin and eye irritation.
- Skin corrosion/irritation
- Causes skin irritation.
- Serious eye damage/irritation
- Causes serious eye irritation.
- Respiratory or skin sensitisation
- May cause allergic skin reactions in sensitive individuals.
- 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)
- UN 3180
- UN-No. (IMDG)
- UN 3180
- UN-No. (IATA)
- UN 3180
- UN-No. (ADN)
- UN 3180
- UN-No. (RID)
- UN 3180
14.2 — UN proper shipping name
- Proper Shipping Name (ADR)
- Pyridinium dichromate
- Proper Shipping Name (IMDG)
- Pyridinium dichromate
- Proper Shipping Name (IATA)
- Pyridinium dichromate
- Proper Shipping Name (ADN)
- Pyridinium dichromate
- Proper Shipping Name (RID)
- Pyridinium dichromate
14.3 — Transport hazard class(es)
- Transport hazard class(es)
- 4.1
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
Pyridinium dichromate is primarily used in organic synthesis as a mild oxidant, particularly for the selective oxidation of alcohols. It is employed in the pharmaceutical industry for the synthesis of various drug compounds, as well as in the production of fine chemicals and fragrances. Additionally, it finds applications in academic research for developing new synthetic methodologies. Its ability to selectively oxidize functional groups makes it a crucial reagent in the field of organic chemistry, particularly in the preparation of aldehydes and ketones from alcohols.
ISO 9001
ISO 14001
GMP
COA with every batch
- Batch Number
- AL-2026-AL1279H
- Manufacturing Date
- September-2026
- Expiry Date
- September-2031
- Molecular Weight
- 376.20 g/mol
| Test | Standard | Observed |
|---|---|---|
| Assay | ≥ 98% | 98.5% |
| Moisture Content | ≤ 1% | 0.5% |
| Residue on Ignition | ≤ 0.5% | 0.3% |
| Related Substances | None detected | None detected |
| Solubility | Soluble in water | Fully soluble |
The above product is expected to comply with 98% Extra Pure grade specification.
Technical Data Sheet
| Grade | Assay/Purity | Melting/Boiling Point | Moisture/LOD | Residue on Ignition | Related Substances | Solubility |
|---|---|---|---|---|---|---|
| 98% Extra Pure | ≥ 98% | 150 °C | ≤ 1% | ≤ 0.5% | None detected | Soluble in water |
Related Products
View AllWhy buy from Alpha Chemika
What Our Scientific & Industrial Customers Say
“Speedy delivery, professional staff.”
“One shop stop for all laboratory chemicals requirements.”
“Exactly as advertised.”
“Alpha Chemika products are of excellent quality. Highly satisfied.”
“From ordering to shipping, every course of action was smooth. Timely delivery.”
“Completely satisfied with the products and services.”
“Speedy delivery, professional staff.”
“One shop stop for all laboratory chemicals requirements.”
“Exactly as advertised.”
“One shop stop for all laboratory chemicals requirements.”
“Exactly as advertised.”
“Alpha Chemika products are of excellent quality. Highly satisfied.”
“Exactly as advertised.”
“Alpha Chemika products are of excellent quality. Highly satisfied.”
“From ordering to shipping, every course of action was smooth. Timely delivery.”
“Alpha Chemika products are of excellent quality. Highly satisfied.”
“From ordering to shipping, every course of action was smooth. Timely delivery.”
“Completely satisfied with the products and services.”
“From ordering to shipping, every course of action was smooth. Timely delivery.”
“Completely satisfied with the products and services.”
“Speedy delivery, professional staff.”
“Completely satisfied with the products and services.”
“Speedy delivery, professional staff.”
“One shop stop for all laboratory chemicals requirements.”
FAQs
Common Questions About Laboratory Chemicals & Solutions
Find answers to common questions about laboratory chemicals, product selection, documentation, ordering, and technical support. Whether you are sourcing chemicals for research, testing, education, manufacturing, or industrial applications, these FAQs can help you make informed purchasing decisions.
Alpha Chemika offers a wide range of laboratory chemicals, reagents, solvents, and specialty products for research, testing, educational, pharmaceutical, and industrial applications.
Product selection depends on factors such as application, required purity, grade, specifications, and intended use. Our team can help you identify suitable products based on your technical requirements.
Yes. Relevant product information and technical documentation can be provided to help you evaluate products for quality, handling, compliance, and application requirements.
Yes. You can share your product list, required quantities, specifications, and delivery requirements with our team for a tailored quotation.
Yes. We support requirements from research laboratories, educational institutions, pharmaceutical companies, manufacturers, distributors, and other scientific and industrial organizations.
Connect with Us for Your Requirements
Have a specific product requirement or need help finding the right chemical for your application? Share your requirements with our team, and we will help you identify suitable products, specifications, quantities, and procurement options.
