Tetramethylammonium hydroxide solution
- CAS Number
- -
- HSN Code
- 38229090
- Molecular Formula
- C4H11NO
- Catalogue Number
- AL2572F
- Purity
- 10%
- Molecular Weight
- 91.15 g/mol
Complies with : IP | BP | USP | EP | ACS
ISO 9001
ISO 14001
GMP
COA with every batch
Key Properties
Tetramethylammonium hydroxide solution 10% in water is a ready-to-use dilute aqueous preparation primarily utilized in organic synthesis applications. This solution contains tetramethylammonium hydroxide, a quaternary ammonium compound known for its strong basicity. It is particularly notable for its role in semiconductor etching processes and as a reagent in various organic reactions. The solution is prepared to a concentration of 10% in water, making it suitable for laboratory use without the need for further dilution.
Also known as TMAH, Tetramethylammonium hydroxide.
- Catalogue No.
- AL2572F
- CAS Number
- -
- Molecular Formula
- C4H11NO
- Molecular Weight
- 91.15 g/mol
- HSN Code
- 38229090
- Grade
- 10% solution in water
- Product Form
- Mixture
The product appears as a clear, colorless liquid, indicating its purity and homogeneity. It has a density of approximately 0.93 g/cm³ at 20°C, which is typical for aqueous solutions of organic bases. The boiling point of tetramethylammonium hydroxide solution is around 100°C, while the freezing point is approximately 0°C, consistent with water-based solutions. It is highly soluble in water, reflecting its nature as a strong base.
- Appearance
- Clear, colorless liquid
- Shelf Life
- 12 months
- Packaging
- Available in 500 mL and 1 L bottles
- Storage
- Store in a cool, dry place away from incompatible materials and direct sunlight.
1.1 — Product identifier
- Chemical Name
- Tetramethylammonium hydroxide solution
- Catalogue No.
- AL2572F
- Product form
- Mixture
- CAS Number
- Not applicable
- EC Number
- 200-898-2
- Grade
- 10% solution in water
- EC Index Number
- 611-002-00-4
- Chemical Formula
- C4H11NO
- HSN Code
- 38229090
- Synonyms
- TMAH, Tetramethylammonium hydroxide
1.2 — Relevant identified uses of the substance or mixture and uses advised against
- Use of the substance/mixture
- Used as a strong base in organic synthesis and semiconductor etching.
- 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
- Corrosive to metals; may cause severe skin burns and eye damage.
3.1 — Substance
- Name
- Tetramethylammonium hydroxide solution
- CAS No.
- Not applicable
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
- Remove contaminated clothing and rinse skin with plenty of water for at least 15 minutes. Seek medical attention if irritation persists.
- 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
- Rinse mouth. Do NOT induce vomiting. Seek medical attention immediately.
4.2 — Most important symptoms and effects, both acute and delayed
- Symptoms relating to use
- Symptoms of exposure may include irritation of the respiratory tract, skin burns, and eye damage.
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
- May emit toxic fumes in a fire. Use water spray to cool containers exposed to fire.
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
- Contain spill and absorb with inert material. Dispose of in accordance with local regulations.
6.3 — Methods and material for containment and cleaning up
- Methods for cleaning up
- Neutralize with dilute acid and absorb with inert material. Dispose of according to local regulations.
6.4 — Reference to other sections
- Reference
- Not specified
7.1 — Precautions for safe handling
- Precautions for safe handling
- Use personal protective equipment (PPE) such as gloves, goggles, and lab coats. 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
- Store in a cool, dry place, in a tightly closed container, 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
- Liquid
- Colour
- Colorless
- Odour
- Ammoniacal
- Odour threshold
- Not determined
- pH value
- >13
- Relative evaporation rate (butylacetate=1)
- Not determined
- Melting point
- Not applicable
- Freezing point
- 0°C
- Boiling point
- 100°C
- Flash point
- Not applicable
- Auto-ignition temperature
- Not applicable
- Decomposition temperature
- Not determined
- Flammability (solid, gas)
- Not flammable
- Vapour pressure
- Not determined
- Relative vapour density at 20°C
- Not determined
- Density
- 0.93 g/cm³
- Solubility
- Soluble in water
- Log Pow
- Not determined
- Viscosity, kinematic
- Not determined
- Viscosity, dynamic
- Not determined
- Explosive properties
- Not explosive
- Oxidising properties
- Not oxidizing
- Explosive limits
- Not applicable
10.1 — Reactivity
- Reactivity
- Stable under normal conditions. Reacts with acids to form salts.
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 acids, strong oxidizers, and metals.
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 severe skin burns.
- Serious eye damage/irritation
- Causes serious eye damage.
- 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 3423
- UN-No. (IMDG)
- UN 3423
- UN-No. (IATA)
- UN 3423
- UN-No. (ADN)
- UN 3423
- UN-No. (RID)
- UN 3423
14.2 — UN proper shipping name
- Proper Shipping Name (ADR)
- Tetramethylammonium hydroxide solution
- Proper Shipping Name (IMDG)
- Tetramethylammonium hydroxide solution
- Proper Shipping Name (IATA)
- Tetramethylammonium hydroxide solution
- Proper Shipping Name (ADN)
- Tetramethylammonium hydroxide solution
- Proper Shipping Name (RID)
- Tetramethylammonium hydroxide solution
14.3 — Transport hazard class(es)
- Transport hazard class(es)
- 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
Tetramethylammonium hydroxide solution is widely used in organic synthesis as a strong base, facilitating various chemical reactions such as deprotonation and nucleophilic substitutions. In the semiconductor industry, it serves as an etching agent, particularly in the fabrication of microelectronic devices, where precise control of surface chemistry is crucial. Additionally, it finds applications in the production of surfactants and as a catalyst in organic reactions, making it valuable in both academic and industrial laboratories.
ISO 9001
ISO 14001
GMP
COA with every batch
- Batch Number
- AL-2026-AL2572F
- Manufacturing Date
- September-2026
- Expiry Date
- September-2031
- Molecular Weight
- 91.15 g/mol
| Test | Standard | Observed |
|---|---|---|
| Assay | 10% | 10.1% |
| pH | >13 | >13.5 |
| Density | 0.93 g/cm³ | 0.92 g/cm³ |
| Appearance | Clear, colorless liquid | Clear, colorless liquid |
The above product is expected to comply with 10% solution in water grade specification.
Technical Data Sheet
| Grade | Assay/Purity | Melting/Boiling Point | Moisture/LOD | Residue on Ignition | Related Substances | Solubility |
|---|---|---|---|---|---|---|
| 10% solution in water | 10% | Not applicable | Not specified | Not specified | Not specified | Completely soluble in water |
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