Industrial chemicals · Taylor, TXTechnical Data Sheet
Technical Data Sheet
Monoethanolamine (MEA) ACS Grade
ACS Grade
- CAS number
- 141-43-5
- UN number
- UN2491
- Hazard class · packing group
- 8 · PG III
- Structure
Structure · PubChem - Grade
- ACS Grade
- Signal word
- Danger
- Hazards
- Proper shipping name
- Ethanolamine
Last reviewed 2026-07-17 by Andre Taki, Chief Commercial Officer.
Identity & Composition
- Product Name
- Monoethanolamine (MEA) ACS Grade
- Alliance Code
- monoethanolamine-mea-acs-grade
- Grade
- ACS Grade
- Concentration
- —
- CAS Number
- 141-43-5PubChem
- Formula
- C2H7NOPubChem
- Molecular Weight
- 61.08PubChem
- Product Type
- Pure substance
Specifications
| Test | Specification | Typical | Method | Source |
|---|---|---|---|---|
| Assay (HOCH2CH2NH2) | min. 99.0 % | 99.5 % | GC, corrected for water | Interpreted |
| Diethanolamine | 0.3 % | 0.3 % | G.C. | Interpreted |
| Ethanol | 0.1 % | 0.1 % | G.C. | Interpreted |
| Heavy Metals (as Pb) | max. 5 ppm | 0.56 ppm | — | Interpreted |
| Identity | passes test | Passes test | IR | Interpreted |
| Iron (Fe) | max. 5 ppm | 0.35 ppm | — | Interpreted |
| Non-volatile matter (residue after evaporation) | 0.2 % | 0.0061 % | — | Interpreted |
| Triethanolamine | 0.1 % | 0.1 % | G.C. | Interpreted |
| Water (H2O) | max. 0.30 % | 0.088 % | coulometry | Interpreted |
| Distillation range (95% between) | 168 °C - 172 °C | 170 °C | ASTM D1078 | Interpreted |
Values are reproduced from the current product reference. Source labels do not by themselves establish a supplier guarantee or a test result for your lot. Confirm applicable acceptance limits and request lot-specific documentation.
Available GradesSame CAS, alternate grades and concentrations
| Grade | Concentration | Typical Assay | SKU | TDS |
|---|---|---|---|---|
| This grade ACS Grade | — | — | current | current |
| Technical | — | — | monoethanolamine-mea | View TDS → |
Typical assay shown is the rolling-window mean from the sibling product's most recent lots. Grade selection drives downstream end-use — verify the sibling grade matches your specification before substitution.
Physical & Chemical Properties
| Property | Value | Source |
|---|---|---|
| Appearance | Clear, colorless liquid | Adjudicated |
| Form | Liquid | Published reference |
| Color | 15 (maximum limit) | Interpreted |
| Odor | Ammonia-like, fishy | Adjudicated |
| pH | 12.1 (25% aqueous solution) | Adjudicated |
| Specific Gravity | 1.016–1.020 at 20 °C (water at 4 °C = 1) | Adjudicated |
| Density | 1.016-1.020 | Interpreted |
| Boiling Point | 170–172 °C (338–342 °F) | Adjudicated |
| Melting Point | 10–11 °C (50–52 °F) | Adjudicated |
| Flash Point | 85–93 °C (185–199 °F), closed cup | Adjudicated |
| Vapor Pressure | About 0.4 mmHg (0.3–0.5 hPa) at 20 °C | Adjudicated |
| Vapor Density | 2.1 (air = 1) | Adjudicated |
| Solubility (water) | Completely miscible with water | Adjudicated |
| Refractive Index (nD 20) | 1.4530 - 1.4550 | Interpreted |
| Viscosity | About 24 mPa·s at 20 °C | Adjudicated |
Materials of Construction
| Material | Rating | Conditions | Source |
|---|---|---|---|
| Glass (packaging container) | Compatible | ACS reagent product as packaged, min. 99.0 % assay; no compatibility limit stated | mgscientific.com |
Compatibility is drawn from published manufacturer and supplier documentation for this product; each rating is sourced. Confirm against your specific duty cycle before equipment selection.
Regulatory & Transport
DOT / 49 CFR
- UN Number
- UN2491Adjudicated
- Hazard Class
- 8Adjudicated
- Packing Group
- IIIAdjudicated
- Proper Shipping Name
- EthanolamineAdjudicated
GHS / OSHA HCS 2024
- Signal Word
- DangerAdjudicated
- H-Codes (Hazard Statements)
- H227, H302, H312, H314, H332, H335Adjudicated
- P-Codes (Precautionary Statements)
- P210, P260, P261, P264, P270, P271, P280, P301+P312, P301+P330+P331, P302+P352, P303+P361+P353, P304+P340, P305+P351+P338, P310, P313, P321, P330, P362, P363, P370+P378, P403+P233, P403+P235, P405, P501Adjudicated
Occupational Exposure Limits
- OSHA PEL (29 CFR 1910.1000)
- 3 ppm TWAOSHA 29 CFR 1910.1000
- ACGIH TLV
- 3 ppm TWA; 6 ppm STELAdjudicated
- NIOSH REL
- 3 ppm (8 mg/m³) TWA; 6 ppm (15 mg/m³) STELAdjudicated
- NIOSH IDLH
- 30 ppmAdjudicated
Transport descriptions reflect 49 CFR 172.101 lookup at time of publication. Sourced data: NIOSH Pocket Guide for REL/IDLH, OSHA Z-Tables for PEL. Always verify against the latest regulatory text before shipment-critical decisions.
Health & Fire Hazard
Acute Toxicology
- LD₅₀ Oral (rat)
- 1,089–1,720 mg/kg (rat)Adjudicated
- LD₅₀ Dermal (rabbit)
- 1,000–2,504 mg/kgAdjudicated
- LC₅₀ Inhalation (rat, 4 h)
- 1.49 mg/L (aerosol, 4 h)Adjudicated
Acute toxicology values from SDS Section 11 or NIOSH RTECS.
Supplier Qualification Packet
One zipped download containing the TDS, SDS, latest lot COA (when available), and a fresh Letter of Continuing Guaranty for Monoethanolamine (MEA) ACS Grade. Every file included is SHA-256 hashed and listed in a manifest your QA team can audit.
Applications
- Analytical laboratory reagent (ACS grade, for analysis)itwreagents.com
- Reagent for testing USP/NF monographs; laboratory, research or manufacturing usemgscientific.com
- Feed stock for pharmaceuticalslabdepotinc.com
- Feed stock for detergents, chemical intermediates and corrosion inhibitorslabdepotinc.com
- Sweetening natural gas and coal gas; used as soap or amides in heavy-duty detergentsnouryon.com
- Scrubbing acidic gases (H2S, CO2)amines.com
Applications are drawn from published manufacturer and supplier documentation; each is sourced. Suitability for a specific use is the buyer's to confirm.
Storage & Handling
- Recommended Storage
- 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).Adjudicated
- Handling Precautions
- Use in ventilation or with respiratory protection — vapour is the primary exposure. Chemical splash goggles and gloves. Open and transfer cool; pressure can build in warm sealed containers. Neutralization with acid is exothermic.Class-level guidance — not product-specific; the SDS controls.
- Incompatibilities
- Strong acids and oxidizers; nitrites and other nitrosating agents (form N-nitrosamines); copper, brass, zinc, aluminum and galvanized metal (corroded); halogenated organic compounds.Adjudicated
- Shelf Life
- Consult Technical Services for product-specific shelf life
For full hazard, PPE, and emergency response guidance, refer to the Safety Data Sheet (SDS) for this product. The SDS controls in all cases where guidance differs.
Packaging & Logistics
Shipping Description (US DOT)
UN2491, Ethanolamine, 8, PG III
Sourced from 49 CFR 172.101. Confirm against shipping documents and carrier requirements before tender.
NMFC Class
65
Placard
Corrosive
Packing Group
PG III
Revision History
Last reviewed 2026-07-17 by Andre Taki, Chief Commercial Officer, DOT Hazmat–certified (49 CFR 172.704).
| Version | Date | Change | Trigger |
|---|---|---|---|
| 1.6 | 2026-10-08 | Canonical data updated: 28 fields changed via the provenance/adjudication pipeline.
| canonical_change |
| 1.5 | 2026-10-05 | Canonical data updated: 3 fields changed via the provenance/adjudication pipeline.
| canonical_change |
| 1.4 | 2026-09-30 | Canonical data updated: 4 fields changed via the provenance/adjudication pipeline.
| canonical_change |
| 1.3 | 2026-07-22 | Canonical data updated: 2 fields changed via the provenance/adjudication pipeline.
| canonical_change |
| 1.2 | 2026-07-17 | Canonical data updated: 3 fields changed via the provenance/adjudication pipeline.
| canonical_change |
| 1.1 | 2026-07-17 | Canonical data re-verified: 5 fields updated against independent vendor SDSs, CLP Annex VI, 49 CFR, and OSHA HazCom 2024 (GHS classification, hazard/precautionary codes, signal word, physical properties as applicable).
| canonical_change |
| 1.0 | 2026-05-20 | Initial URL-first TDS published from canonical chemistry registry. | initial |
This Technical Data Sheet is provided for technical reference. The Safety Data Sheet (SDS) controls in all cases where guidance differs. Values reflect Alliance Chemical canonical data at time of generation; subsequent revisions are recorded in the Revision History above.