Monoethanolamine (MEA) ACS Grade

Product Identifier

Monoethanolamine (MEA) ACS Grade

Grade

ACS Grade

CAS Number

141-43-5

Chemical Formula

C2H7NO

Molecular Weight

61.08 g/mol

Manufacturer

Alliance Chemical
204 South Edmond Street, Taylor, TX 76574

Emergency Phone

Chemtel 1-800-255-3924 (24/7)

Synonyms

2-Aminoethanol; ethanolamine; 2-hydroxyethylamine; colamine; MEA

Recommended Use

Laboratory and analytical reagent (ACS grade); buffer preparation and synthesis.

Restrictions on Use

For industrial and laboratory use. Corrosive: avoid all contact. Never mix with nitrites or other nitrosating agents (forms N-nitrosamines), acids or oxidizers.

Classification

• Flammable liquids, Category 4
• Acute toxicity (oral), Category 4
• Acute toxicity (dermal), Category 4
• Skin corrosion/irritation, Category 1
• Serious eye damage/eye irritation, Category 1
• Acute toxicity (inhalation), Category 4
• Specific target organ toxicity, single exposure, Category 3 (respiratory tract irritation)

Signal Word

Danger

Hazard Statements

• H227Combustible liquid
• H302Harmful if swallowed
• H312Harmful in contact with skin
• H314Causes severe skin burns and eye damage
• H332Harmful if inhaled
• H335May cause respiratory irritation

Precautionary Statements

• P210Keep away from heat, hot surfaces, sparks, open flames and other ignition sources. No smoking.
• P260Do not breathe dust, fume, gas, mist, vapors or spray.
• P261Avoid breathing dust, fume, gas, mist, vapors or spray.
• P264Wash hands and face thoroughly after handling.
• P270Do not eat, drink or smoke when using this product.
• P271Use only outdoors or in a well-ventilated area.
• P280Wear protective gloves, protective clothing, and eye/face protection.
• P301+P312IF SWALLOWED: Call a POISON CENTER or doctor if you feel unwell.
• P301+P330+P331IF SWALLOWED: Rinse mouth. Do NOT induce vomiting.
• P302+P352IF ON SKIN: Wash with plenty of water and soap.
• P303+P361+P353IF ON SKIN (or hair): Take off immediately all contaminated clothing. Rinse skin with water or shower.
• P304+P340IF INHALED: Remove person to fresh air and keep comfortable for breathing.
• P305+P351+P338IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.
• P310Immediately call a POISON CENTER or doctor.
• P313Get medical advice or attention.
• P321Specific treatment (see first-aid information on this label).
• P330Rinse mouth.
• P362Take off contaminated clothing and wash before reuse.
• P363Wash contaminated clothing before reuse.
• P370+P378In case of fire: Use dry chemical, CO2 or water spray to extinguish.
• P403+P233Store in a well-ventilated place. Keep container tightly closed.
• P403+P235Store in a well-ventilated place. Keep cool.
• P405Store locked up.
• P501Dispose of contents and container in accordance with local, regional, national, and international regulations.

Classification, hazard (H) and precautionary (P) statements and pictograms per OSHA HCS 2024 (29 CFR 1910.1200, Appendices A–C), aligned with GHS Rev. 7.

Concentrations are nominal; lot-specific values appear on the Certificate of Analysis. Components not contributing to classification are omitted.

Eyes

Rinse with plenty of water for at least 15 minutes. Remove contact lenses if present and easy to do. Continue rinsing. Seek medical attention immediately.

Skin

Immediately flush with plenty of water for at least 15 minutes while removing contaminated clothing. Wash with soap. Get medical attention immediately.

Inhalation

Move person to fresh air and keep comfortable for breathing. If breathing is difficult, give oxygen. If not breathing, give artificial respiration. Get medical attention immediately.

Ingestion

Do Not Induce Vomiting! Never give anything by mouth to an unconscious person. If conscious, wash out mouth with water. Get medical attention immediately.

Most Important Symptoms and Effects

• Causes burns to the skin, eyes and mucous membranes; eye contact may cause permanent damage including blindness; ingestion burns the mouth, throat and stomach.
• Inhalation may irritate the nose, throat and respiratory tract (coughing, sore throat).
• Ingestion may cause nausea, vomiting and abdominal pain; larger amounts may cause systemic poisoning.
• Absorption through the skin may cause systemic poisoning.
• Inhalation may cause coughing, shortness of breath and headache; high concentrations may cause systemic poisoning.

Immediate Medical Attention and Special Treatment

• Immediate medical attention is required after eye or skin contact or ingestion; tissue damage may continue after exposure ends.

Suitable Extinguishing Media

Dry chemical, CO2, water spray. Use water spray to cool containers.

Unsuitable Extinguishing Media

Do not use a solid water stream as it may scatter and spread fire.

Specific Hazards Arising from the Chemical

Vapors are heavier than air and may form explosive mixtures with air; they can travel to a source of ignition and flash back. Fire may release corrosive and toxic gases. Containers may rupture when heated.

Protective Equipment

Wear self-contained breathing apparatus and full protective clothing.

Hazardous Combustion Products

Nitrogen oxides, ammonia, carbon monoxide and carbon dioxide.

Personal Precautions

Use PPE as described in Section 8. Ensure adequate ventilation. Evacuate personnel to safe areas.

Hazard-Specific Precautions

Eliminate all ignition sources. Use non-sparking tools and explosion-proof equipment; ground and bond containers during cleanup. Do not touch spilled material without protective equipment. Neutralize residue only with a method suitable for the material, then collect.

Environmental Precautions

Prevent leakage or spillage from entering drains, sewers, or waterways.

Containment & Cleanup

Absorb with inert material. Collect in appropriate waste container. Dispose per applicable regulations.

Safe Handling

Use with adequate ventilation. Avoid contact with skin, eyes, and clothing. Wash thoroughly after handling. Keep container closed when not in use.

Safe Storage

Store in a cool, dry, well-ventilated area. Use corrosion-resistant containers. Keep away from incompatible materials (see Section 10). Keep containers tightly closed.

Specific Storage Precautions

Keep tightly closed in steel or stainless-steel containers (never copper, brass, zinc or aluminum), in a cool, ventilated area away from acids, oxidizers, nitrites and ignition sources. Protect from freezing (solidifies at about 10 °C).

Occupational Exposure Limits

Engineering Controls

Use adequate ventilation. Provide eyewash stations and quick-drench showers accessible to areas of use.

Eye/Face Protection

Wear chemical safety goggles or face shield.

Skin Protection

Wear chemical-resistant gloves and protective clothing.

Respiratory Protection

Where mist, spray or dust is generated (e.g., spraying, atomization, pressure washing), use a NIOSH-approved half-face air-purifying respirator with combination acid gas / P100 cartridges. Ensure local exhaust ventilation.

Exposure limits sourced from NIOSH Pocket Guide, OSHA 29 CFR 1910.1000 and ACGIH TLVs.

Appearance

Clear, colorless liquid

Odor

Ammonia-like, fishy

Odor Threshold

2.6 ppm

pH

12.1 (25% aqueous solution)

Melting Point / Freezing Point

10–11 °C (50–52 °F)

Boiling Point

170–172 °C (338–342 °F)

Flash Point

85–93 °C (185–199 °F), closed cup

Evaporation Rate

No data available

Flammability (solid, gas)

No data available

Upper/Lower Flammability or Explosive Limits

LEL 2.5% / UEL 17% (v/v in air)

Vapor Pressure

About 0.4 mmHg (0.3–0.5 hPa) at 20 °C

Vapor Density

2.1 (air = 1)

Relative Density

1.016–1.020 at 20 °C (water at 4 °C = 1)

Solubility

Completely miscible with water

Partition Coefficient (n-octanol/water)

log Kow -1.91

Auto-ignition Temperature

No data available

Decomposition Temperature

No data available

Viscosity

About 24 mPa·s at 20 °C

Particle Characteristics

Not applicable

Form

Liquid

Color

15 (maximum limit)

Density

1.016-1.020

Refractive Index

1.4530 - 1.4550

Values shown reflect product-specific canonical data. Lot-specific ranges may vary; see the Certificate of Analysis for the shipped lot.

Reactivity

Not reactive under normal conditions of use and storage.

Chemical Stability

Stable under recommended storage conditions.

Possibility of Hazardous Reactions

None under normal processing conditions.

Conditions to Avoid

Heat, sparks and open flame (combustible); prolonged exposure to air and carbon dioxide (absorbs them and discolors); freezing below about 10 °C.

Incompatible Materials

Strong acids and oxidizers; nitrites and other nitrosating agents (form N-nitrosamines); copper, brass, zinc, aluminum and galvanized metal (corroded); halogenated organic compounds.

Hazardous Decomposition Products

Nitrogen oxides, ammonia, carbon monoxide and carbon dioxide.

See below for route-specific acute toxicity data.

Likely Routes of Exposure

Inhalation, skin contact, eye contact, ingestion.

Symptoms

• Causes burns to the skin, eyes and mucous membranes; eye contact may cause permanent damage including blindness; ingestion burns the mouth, throat and stomach.
• Inhalation may irritate the nose, throat and respiratory tract (coughing, sore throat).
• Ingestion may cause nausea, vomiting and abdominal pain; larger amounts may cause systemic poisoning.
• Absorption through the skin may cause systemic poisoning.
• Inhalation may cause coughing, shortness of breath and headache; high concentrations may cause systemic poisoning.

Delayed and Chronic Effects

• No delayed or chronic effects identified beyond the classification in Section 2.

Carcinogen Classification

Ecotoxicity

Fish LC50: 170 mg/L (96 h, Carassius auratus (goldfish); cf. 24-h LC50 190 mg/L same source)

Persistence & Degradability

Low persistence — Readily biodegradable (64–91% CO₂ in 28 d)

Bioaccumulative Potential

log Kow −1.31, BCF 3.2 (estimated; low)

Mobility in Soil

Very high soil mobility (estimated Koc 0.59)

Dispose of contents/container in accordance with applicable federal, state, and local regulations. Do not dispose of into drains or waterways.

EPA RCRA Waste Codes

Not a P- or U-listed waste. Evaluate for D002 (corrosive); the generator makes the final hazardous-waste determination.

If discarded, this material may be a corrosive hazardous waste (EPA RCRA D002, 40 CFR 261.22): aqueous with pH ≤ 2 or ≥ 12.5, or a liquid that corrodes steel at more than 6.35 mm per year. The waste generator must make the final hazardous-waste determination.

US DOT (49 CFR)

UN Number

UN2491

Proper Shipping Name

Ethanolamine

Hazard Class

8

Packing Group

III

IMDG / IATA classifications may differ from US DOT. Verify current regulations before international shipment.

CERCLA Reportable Quantity (RQ)

Not a CERCLA hazardous substance (no RQ). Not an EPCRA Section 302 or 313 chemical.

SARA 311/312 hazard categories correspond to the GHS classification in Section 2. Data retrieved as of: California Proposition 65 2026-10-02; US EPA TSCA Active Inventory 2026-10-02; EPCRA SARA 313 (TRI) 2026-10-02.

Revision Date

2026-10-08

Format

16-section format per OSHA HCS 2024 (29 CFR 1910.1200, Appendix D), aligned with GHS Rev. 7.