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102-71-6

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Identification

Name
Triethanolamine
CAS
102-71-6
Synonyms
2,2,2-NITRILOETHANOL
2,2',2''-NITRILOTRIETHANOL
2,2,2-NITRILOTRIETHANOL
2,2',2''-TRIHYDROXYTRIETHYLAMINE
(2-HYDROXYETHYL)AMINE
AURORA KA-7827
TEA
TRI-BETA-HYDROXY ETHYLAMINE
TRIETHANOLAMINE
TRIETHANOLAMINE BUFFER
TRIETHANOLAMINE T 85
TRIS(2-HYDROXYETHYL)AMINE
TROLAMINE
2,2',2-Nitrilotris(ethanol)
2,2',2''-Nitrilotris[ethanol]
2,2’,2"-nitrilotris(ethanol)
2,2’,2’’-Nitrilortrisethanol
2,2’,2’’-nitrilotri-ethano
2,2’,2’’-nitrilotris(ethanol)
2,2’,2’’-nitrilotris-ethano
EINECS(EC#)
203-049-8
Molecular Formula
C6H15NO3
MDL Number
MFCD00002855
Molecular Weight
149.19
MOL File
102-71-6.mol

Chemical Properties

Description
Triethanolamine is a viscous, colourless/pale yellow liquid with a weak ammoniacal odour. Triethanolamine is incompatible with copper, copper alloys, galvanised iron, acids, and oxidisers. Reports indicate that in India itself, as many as six companies manufacture triethanolamine and it is manufactured by many different countries around the world. Global production and industrial application of triethanolamine is very extensive.
In industries, triethanolamine is used as a corrosion inhibitor in metal-cutting fluids; a curing agent for epoxy and rubber polymers; a copper–triethanolamine; in emulsifiers, thickeners, and wetting agents in the formulation of consumer products such as cosmetics, detergents, shampoos, and other personal products; and a neutraliser-dispersing agent in agricultural herbicide formulations. In brief, triethanolamine has wide applications as a corrosion inhibitor, a surface-active agent, and an intermediate in various products including metalworking fluids, oils, fuels, paints, inks, cement, cosmetic, and personal products and formulations of algicides and herbicides.
Appearance
Clear, amber viscous liquid
Appearance
Ethanolamines can be detected by odor as low as 23 ppm. Monoethanolamine is a colorless, viscous liquid or solid (below 111C) with an unpleasant, ammonialike odor
Melting point 
21 °C
mp 
21 °C
Boiling point 
360 °C
bp 
360 °C
density 
1.1245
vapor density 
5.14 (vs air)

vapor pressure 
0.01 mm Hg ( 20 °C)

refractive index 
n20/D 1.485(lit.)

Fp 
365 °F

storage temp. 
Store at RT.
solubility 
H2O: 1 M, clear, colorless

form 
Oily Liquid
color 
Clear colorless to slightly yellow
pka
7.8(at 25℃)
PH
10.5-11.5 (25℃, 1M in H2O)
explosive limit
3.6-7.2%(V)
Water Solubility 
soluble
Sensitive 
Air Sensitive & Hygroscopic
Merck 
14,9665
BRN 
1699263
Contact allergens
This emulsifying agent can be contained in many products such as cosmetics, topical medicines, metalworking cut- ting fluids, and color film developers. Traces may exist in other ethanolamines such as monoand diethanolamine. Contact allergy seems to be rarer than previously thought.
Uses
TEA (triethanolamine) is an emulsifier and pH adjuster.
CAS DataBase Reference
102-71-6(CAS DataBase Reference)
NIST Chemistry Reference
Triethanolamine(102-71-6)
EPA Substance Registry System
102-71-6(EPA Substance)

Hazard Information

Chemical Properties
Triethanolamine is a pale yellow and viscous liquid. It is hygroscopic with an irritant and ammoniacal odor. There are multiple industrial and domestic applications for this compound, i.e., in the manufacture of toilet products, cosmetics formulations, solvents for waxes, resins, dyes, paraffi ns and polishes, herbicides, and lubricants for textile products. In the pharmaceutical industry, triethanolamine is used as a non-steroidal, antiinfl ammatory agent, an emulsifi er, and an alkylating agent.
Definition
ChEBI: A tertiary amino compound that is ammonia in which each of the hydrogens is substituted by a 2-hydroxyethyl group.
General Description
Oily liquid with a mild ammonia odor. Denser than water. Freezing point is 71°F.
Reactivity Profile
TRIETHANOLAMINE(102-71-6) is an aminoalcohol. Neutralize acids to form salts plus water in exothermic reactions. Amines may be incompatible with isocyanates, halogenated organics, peroxides, phenols (acidic), epoxides, anhydrides, and acid halides. Flammable gaseous hydrogen is generated in combination with strong reducing agents, such as hydrides. Reacts violently with strong oxidants. [Handling Chemicals Safely 1980. p. 928].
Air & Water Reactions
Water soluble.
Health Hazard
Liquid may irritate eyes and skin.
Health Hazard
Exposures to triethanolamine, in contrast with other chemical compounds, is known to cause low toxicity to animals and the acute oral LD50 to rats and guinea pigs ranges from 8000 to 9000 mg/kg. Triethanolamine was found to be a moderate eye irritant. A 5%–10% solution of triethanolamine did not induce skin irritation or skin sensitization. Studies of Inoue et al. and many other workers have indicated the absence of the mutagenic potential of triethanolamine as evidenced by both in vivo and in vitro studies (Salmonella typhimurium tests, Chinese hamster ovary cells, and rat liver chromosome analysis). Further, extensive studies have demonstrated the absence of potential carcinogenicity of triethanolamine in rats and mice, suggesting a low or lack of acute or chronic toxicity of the chemical to mammals.
Potential Exposure
Monoethanolamine is widely used in industry for scrubbing acid gases and in production of detergents and alkanolamide surfactants; to remove carbon dioxide and hydrogen from natural gas, to remove hydrogen sulfide and carbonyl sulfide; as an alkaline conditioning agent; as an intermediate for soaps, detergents, dyes, and textile agents. Diethanolamine is an absorbent for gases; a solubilizer for 2,4- dichlorophenoxyacetic acid (2,4-D); and a softener and emulsifier intermediate for detergents. It also finds use in the dye and textile industry. Triethanolamine is used as plasticizers, neutralizer for alkaline dispersions; lubricant additive; corrosion inhibitor; and in the manufacture of soaps, detergents, shampoos, shaving preparations; face and hand creams; cements, cutting oils, insecticides, surface active agents; waxes, polishes, and herbicides.
Fire Hazard
Special Hazards of Combustion Products: Poisonous gases, such as NOx, may be produced
First aid
If this chemical gets into the eyes, remove any contact lenses at once and irrigate immediately for at least 15 minutes, occasionally lifting upper and lower lids. Seek medical attention immediately. If this chemical contacts the skin, remove contaminated clothing and wash immediately with soap and water. Speed in removing material from skin is of extreme importance. Shampoo hair promptly if contaminated. Seek medical attention immediately. If this chemical has been inhaled, remove from exposure, begin rescue breathing (using universal precautions, including resuscitation mask) if breathing has stopped and CPR if heart action has stopped. Transfer promptly to a medical facility. When this chemical has been swallowed, get medical attention. Give large quantities of water and induce vomiting. Do not make an unconscious person vomit
Shipping
UN2491 Ethanol amine or Ethanolamine solutions, Hazard class: 8; Labels: 8-Corrosive material.
Incompatibilities
Monoethanolamine: This chemical is a medium-strong base. Reacts violently with strong oxidizers, acetic acid; acetic anhydride; acrolein, acrylic acid; acrylonitrile, cellulose nitrate; chlorosulfonic acid; epichlorohydrin, hydrochloric acid; hydrogen fluoride; mesityl oxide; nitric acid; oleum, sulfuric acid; β-propiolactone; and vinyl acetate. Reacts with iron. May attack copper, aluminum, and their alloys, and rubber. Di-isomer: Oxidizers, strong acids; acid anhydrides; halides. Reacts with CO2 in the air. Hygroscopic (i.e., absorbs moisture from the air). Corrosive to copper, zinc, and galvanized iron (di-). The aqueous solution is a medium strong base. Attacks copper, zinc, aluminum, and their alloys.
Waste Disposal
Controlled incineration; incinerator equipped with a scrubber or thermal unit to reduce nitrogen oxides emissions

Safety Data

Hazard Codes 
Xi
Risk Statements 
R36/37/38:Irritating to eyes, respiratory system and skin .
R36:Irritating to the eyes.
Safety Statements 
S26:In case of contact with eyes, rinse immediately with plenty of water and seek medical advice .
S39:Wear eye/face protection .
S36:Wear suitable protective clothing .
WGK Germany 
1

RTECS 
KL9275000


3-10-23
TSCA 
Yes
HS Code 
29221310
HS Code 
29321900
Safety Profile
Moderately toxic by intraperitoneal route. Mildly toxic by ingestion. Liver and kidney damage have been demonstrated in animals from chronic exposure. A human and experimental skin irritant. An eye irritant. Questionable carcinogen with experimental carcinogenic data. Combustible liquid when exposed to heat or flame; can react vigorously with oxidizing materials. To fight fire, use alcohol foam, CO2, dry chemical. When heated to decomposition it emits toxic fumes of NOx and CN-.
Hazardous Substances Data
102-71-6(Hazardous Substances Data)

Raw materials And Preparation Products

Material Safety Data Sheet(MSDS)

msds information
TEA(102-71-6).msds

Questions And Answer

General description
Triethanolamine is a colorless oily liquid with the smell of ammonia. It is easy to absorb water and will turn into brown color when being exposed to the air and the light. At low temperature, it will become colorless or pale yellow cubic crystal. It is miscible with water, methanol and acetone. It is soluble in benzene, ether, slightly soluble in carbon tetrachloride, n-heptane. It is a kind of strong alkaline, combining with protons, can be used for condensation reaction.
Early strength agent
Triethanolamine is currently a commonly used early strength agent used in China's cement industry with the effect of early strength agent being accelerating hydration process of the cement in the presence of liquid phase in the concrete to improve the early strength. Although triethanolamine does not change the hydration product of cement, it can enhance the activity of the colloid generated through the hydration of cement, producing pressure to surrounding regions, blocking the capillary channel, exacerbating the effect of the adsorption, wetting and dispersion of particles and so on, promoting the reaction of the formation of hydrated calcium sulfoaluminate between the C3A and gypsum. This can improve the density of concrete, anti-permeability and antifreeze property, playing the role of early strength and enhancing the strength.
When used in combination with inorganic salts, it can play a catalytic role due to the hydration of cement itself and the reaction between inorganic salts and cement, so that the effect of early strength is particularly significant in the case.
Chemical properties
At room temperature, it appears as colorless transparent viscous liquid with hygroscopicity and ammonia smell. It is alkaline, being irritating. It has a melting point of 21.2 °C, the boiling point of 360 °C, a flash point of 193 ° C, the relative density (d420) 1.1242 and refractive index (nD20) of 1.4852. It is miscible with water, ethanol and acetone, slightly soluble in ether, benzene and carbon tetrachloride.
Uses
In analytical chemistry, triethanolamine can be used as the stationary phase for the gas liquid chromatography (the maximum temperature is 75 ℃ with the solvent being methanol and ethanol), used for the separation of pyridine and methyl substitutes. In the complexometric titration and other analysis, it can be used as a masking agent for interfering ions. For example, in a solution of pH = 10, when we apply EDTA for titration of magnesium, zinc, cadmium, calcium, nickel and other ions, the reagent can be used for masking titanium, aluminum, iron, tin and some other ions. In addition, it can also be dubbed with hydrochloric acid into a buffer solution of a certain pH value.
Triethanolamine is mainly used in the manufacture of surfactants, liquid detergents, cosmetics and so on. It is one of the components of cutting fluid and antifreeze fluid. During the nitrile rubber polymerization, it can be used as an activator, being the vulcanization activator of natural rubber and synthetic rubber. It can also be used as the emulsifiers of oil, wax and pesticides, the moisturizer and stabilizer of cosmetics, textile softeners as well as the anti-corrosion additives of lubricants. Triethanolamine is also capable of absorbing carbon dioxide and hydrogen sulfide and other gases. During the cleaning of the coke oven gas and other industrial gases, it can be used for removal of acid gases. It is also a commonly used masking agent in the EDTA titration assay.
Production method
Feed the ethylene oxide and ammonia water are into the reactor; conduct the condensation reaction under a reaction temperature of 30-40 °C and a reaction pressure of 70.9-304 kPa to generate a mixture solution of mono-, di-and triethanolamine; after undergoing dehydration and concentration at 90-120 °Cand then send to three vacuum distillation tower for vacuum distillation; capture different fractions according to different boiling points, you can get over 99% purity of the finished product of ethanolamine, diethanolamine and triethanolamine. During the course of the reaction, if increase the proportion of ethylene oxide, the generation ratio of di-and tri-ethanolamine will increase so we can get higher di-and tri-ethanolamine yield.
It is manufactured through the condensation reaction between ethylene oxide and ammonia under 30~40 °C and the pressure 71~304 kPa, in which the molar concentration of ethylene oxide and ammonia ratio is about 2.0. After the reaction, perform vacuum distillation through the distillation column, cut off the fractions of about 360 °C.

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