Triethyl phosphite
- CAS Number
- 122-52-1
- HSN Code
- 29209099
- Molecular Formula
- C6H15O3P
- Catalogue Number
- AL2579B
- Purity
- ≥ 98%
- Molecular Weight
- 166.16 g/mol
Complies with : IP | BP | USP | EP | ACS
ISO 9001
ISO 14001
GMP
COA with every batch
Key Properties
Triethyl phosphite (for synthesis) is a reactive phosphorus(III) ester that plays a crucial role in various organic synthesis processes, particularly in the Arbuzov reaction and the synthesis of organophosphorus compounds. This compound is notable for its ability to act as a nucleophile, facilitating the formation of phosphonate esters, which are important intermediates in the production of agrochemicals and pharmaceuticals. With a purity of 98%, it is suitable for high-quality synthesis applications, ensuring reliable results in laboratory and industrial settings.
Also known as Triethyl phosphite, Phosphorous acid triethyl ester.
- Catalogue No.
- AL2579B
- CAS Number
- 122-52-1
- Molecular Formula
- C6H15O3P
- Molecular Weight
- 166.16 g/mol
- HSN Code
- 29209099
- Grade
- For Synthesis
- Product Form
- Substance
Triethyl phosphite is a colorless to pale yellow liquid with a density of 0.969 g/mL at 20°C. It has a boiling point of approximately 162°C and a flash point of 40°C, indicating its flammable nature. The compound is soluble in organic solvents such as ethanol and ether, but it is not miscible with water. Its refractive index is around 1.426, and it has a viscosity of 1.5 mPa·s at 20°C, which is typical for low molecular weight esters.
- Appearance
- Colorless to pale yellow liquid
- Shelf Life
- 2 years
- Packaging
- Available in 1L and 5L glass bottles
- Storage
- Store in a cool, dry place away from heat and ignition sources.
1.1 — Product identifier
- Chemical Name
- Triethyl phosphite
- Catalogue No.
- AL2579B
- Product form
- Substance
- CAS Number
- 122-52-1
- EC Number
- 204-558-8
- Grade
- For Synthesis
- EC Index Number
- phosphite esters
- Chemical Formula
- C6H15O3P
- HSN Code
- 29209099
- Synonyms
- Triethyl phosphite, Phosphorous acid triethyl ester
1.2 — Relevant identified uses of the substance or mixture and uses advised against
- Use of the substance/mixture
- Reagent in organic synthesis, particularly in the Arbuzov reaction.
- 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. Prolonged exposure may cause skin and eye irritation.
3.1 — Substance
- Name
- Triethyl phosphite
- CAS No.
- 122-52-1
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. If irritation occurs, seek medical attention.
- First-aid measures after eye contact
- Rinse cautiously with water for several minutes. Remove contact lenses if present and easy to do. Continue rinsing. Seek medical attention if irritation persists.
- 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; headache; dizziness.
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
- Flammable liquid. Vapors may form explosive mixtures with air.
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. Remove all sources of ignition. Ventilate area.
6.3 — Methods and material for containment and cleaning up
- Methods for cleaning up
- Contain spill with inert material and transfer to appropriate waste disposal container.
6.4 — Reference to other sections
- Reference
- Not specified
7.1 — Precautions for safe handling
- Precautions for safe handling
- Use in a well-ventilated area. Avoid contact with skin and eyes. Keep away from heat and ignition sources.
- 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 in tightly closed containers.
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
- Liquid
- Colour
- Colorless to pale yellow
- Odour
- Slightly pungent
- Odour threshold
- No data available
- pH value
- No data available
- Relative evaporation rate (butylacetate=1)
- No data available
- Melting point
- -80°C
- Freezing point
- No data available
- Boiling point
- 162°C
- Flash point
- 40°C
- Auto-ignition temperature
- No data available
- Decomposition temperature
- No data available
- Flammability (solid, gas)
- Flammable liquid
- Vapour pressure
- 0.5 mmHg at 20°C
- Relative vapour density at 20°C
- No data available
- Density
- 0.969 g/mL
- Solubility
- Soluble in organic solvents, insoluble in water
- Log Pow
- No data available
- Viscosity, kinematic
- No data available
- Viscosity, dynamic
- 1.5 mPa·s at 20°C
- Explosive properties
- No data available
- Oxidising properties
- No data available
- Explosive limits
- No data available
10.1 — Reactivity
- Reactivity
- Stable under normal conditions. Reacts with strong oxidizing 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 oxidizers, strong acids, and bases.
10.6 — Hazardous decomposition products
- Hazardous decomposition products
- Not specified
11.1 — Information on toxicological effects
- Acute toxicity
- LD50 (oral, rat) > 2000 mg/kg
- Skin corrosion/irritation
- Causes mild skin irritation.
- Serious eye damage/irritation
- Causes serious eye irritation.
- Respiratory or skin sensitisation
- Not a skin sensitizer.
- 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 2323
- UN-No. (IMDG)
- UN 2323
- UN-No. (IATA)
- UN 2323
- UN-No. (ADN)
- UN 2323
- UN-No. (RID)
- UN 2323
14.2 — UN proper shipping name
- Proper Shipping Name (ADR)
- Triethyl phosphite
- Proper Shipping Name (IMDG)
- Triethyl phosphite
- Proper Shipping Name (IATA)
- Triethyl phosphite
- Proper Shipping Name (ADN)
- Triethyl phosphite
- Proper Shipping Name (RID)
- Triethyl phosphite
14.3 — Transport hazard class(es)
- Transport hazard class(es)
- 3
14.4 — Packing group
- Packing group (ADR)
- III
- Packing group (IMDG)
- III
- Packing group (IATA)
- III
- Packing group (ADN)
- III
- Packing group (RID)
- III
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
Triethyl phosphite is widely used in the field of organophosphorus chemistry, particularly as a reagent in the Michaelis-Arbuzov reaction, which is essential for synthesizing phosphonate esters. These esters are valuable in the production of various agrochemicals, including herbicides and insecticides, as well as in the synthesis of pharmaceuticals and fine chemicals. Additionally, it serves as a precursor in the preparation of flame retardants and plasticizers, showcasing its versatility across multiple industries.
ISO 9001
ISO 14001
GMP
COA with every batch
- Batch Number
- AL-2026-AL2579B
- Manufacturing Date
- September-2026
- Expiry Date
- September-2031
- Molecular Weight
- 166.16 g/mol
| Test | Standard | Observed |
|---|---|---|
| Assay | ≥ 98% | 98.5% |
| Density | 0.969 g/mL | 0.968 g/mL |
| Boiling Point | 162°C | 162°C |
| Moisture Content | ≤ 0.5% | 0.3% |
| Residue on Ignition | ≤ 0.1% | 0.05% |
| Related Substances | None detected | None detected |
The above product is expected to comply with For Synthesis grade specification.
Technical Data Sheet
| Grade | Assay/Purity | Melting/Boiling Point | Moisture/LOD | Residue on Ignition | Related Substances | Solubility |
|---|---|---|---|---|---|---|
| 98% | ≥ 98% | 162°C | ≤ 0.5% | ≤ 0.1% | None detected | Soluble in organic solvents |
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