124-40-3
Dimethylamine
CAS: 124-40-3
Molecular Formula: C2H7N
124-40-3 - Names and Identifiers
| Name | Dimethylamine |
| Synonyms | Dimethylamine N-Methylmethylamine N-methylmethanamine dimethylamine,anhydre Dimethylamine anhydrous dimethylamine,anhydrous N-methylmethanamine sulfate DiMethylaMine (~2.0 M in THF) DiMethylaMine, 2M solution in THF, AcroSeal DiMethylaMine, 2.0 M solution in THF, SpcSeal DiMethylaMine, 2.0 M solution in Methanol, SpcSeal DiMethylaMine, 2M solution in Methyl alcohol, AcroSeal |
| CAS | 124-40-3 |
| EINECS | 204-697-4 |
| InChI | InChI=1/C2H7N/c1-3-2;1-5(2,3)4/h3H,1-2H3;(H2,1,2,3,4)/p-2 |
124-40-3 - Physico-chemical Properties
| Molecular Formula | C2H7N |
| Molar Mass | 45.08 |
| Density | 0.89g/mLat 25°C |
| Melting Point | −93°C(lit.) |
| Boling Point | 7°C(lit.) |
| Flash Point | 60°F |
| Water Solubility | Miscible with water and most organic solvents. |
| Solubility | very soluble in water (163 g/100 g water at 40°C); soluble in ethanol,ethyl ether, and many organic solvents |
| Vapor Presure | 16.97 psi ( 55 °C) |
| Vapor Density | 1.55 (vs air) |
| Appearance | Solution |
| Color | Clear slightly yellow |
| Odor | Ammonical odour |
| Exposure Limit | TLV-TWA 10 ppm (～18 mg/m3) (ACGIH,MSHA, and OSHA); IDLH 2000 ppm(NIOSH). |
| Merck | 14,3228 |
| BRN | 605257 |
| pKa | 10.68(at 25℃) |
| Storage Condition | Flammables area |
| Stability | Stable. Generally used as a solution in water at concentrations up to around 40%. Extremely flammable in the pure form. Incompatible with strong oxidizing agents. |
| Sensitive | Hygroscopic |
| Explosive Limit | 14.4% |
| Refractive Index | n20/D 1.37 |
| Physical and Chemical Properties | Properties colorless flammable gas or liquid, high concentration or compression liquefaction, with a strong unpleasant ammonia odor, very low concentrations of fish oil odor. boiling point 6.9 ℃ relative density 0.654 refractive index 1.347 flash point -17.78 ℃ soluble in water, soluble in ethanol and ether. |
| Use | For the production of drugs, dyes, pesticides, leather wool agent, rubber vulcanization accelerator, rocket propellant raw materials |
124-40-3 - Risk and Safety
| Risk Codes | R12 - Extremely Flammable R20 - Harmful by inhalation R37/38 - Irritating to respiratory system and skin. R41 - Risk of serious damage to eyes R34 - Causes burns R20/22 - Harmful by inhalation and if swallowed. R11 - Highly Flammable R39/23/24/25 - R23/24/25 - Toxic by inhalation, in contact with skin and if swallowed. R52/53 - Harmful to aquatic organisms, may cause long-term adverse effects in the aquatic environment. R40 - Limited evidence of a carcinogenic effect R19 - May form explosive peroxides |
| Safety Description | S3 - Keep in a cool place. S16 - Keep away from sources of ignition. S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S29 - Do not empty into drains. S36/37/39 - Wear suitable protective clothing, gloves and eye/face protection. S45 - In case of accident or if you feel unwell, seek medical advice immediately (show the label whenever possible.) S39 - Wear eye / face protection. S61 - Avoid release to the environment. Refer to special instructions / safety data sheets. |
| UN IDs | UN 2924 3/PG 2 |
| WGK Germany | 2 |
| RTECS | IP8750000 |
| FLUKA BRAND F CODES | 3 |
| TSCA | Yes |
| HS Code | 29211100 |
| Hazard Class | 3 |
| Packing Group | II |
| Toxicity | Acute oral LD50 for guinea pigs 340 mg/kg, mice 316 mg/kg, rats 698 mg/kg, rabbits 240 mg/kg (quoted, RTECS, 1985). |
124-40-3 - Upstream Downstream Industry
124-40-3 - Nature
Open Data Verified Data
is a colorless flammable gas or liquid, and has a strong unpleasant ammonia odor at a high concentration or compression liquefaction, and the odor of fish oil at a very low concentration. Soluble in water, soluble in ethanol and ether. Toxic.
Last Update：2024-01-02 23:10:35
124-40-3 - Preparation Method
Open Data Verified Data
methanol and ammonia are mixed in a certain proportion, and under a certain temperature and pressure, the active alumina is used as a catalyst to synthesize a mixture of one, two and three methylamine, and then heat exchange, condensation, deammoniation, extraction, dehydration, separation, dimethyl amine product. For details see monomethylamine.
Last Update：2022-01-01 10:34:22
124-40-3 - Use
Open Data Verified Data
This product is mainly used as rubber vulcanization accelerator, leather hair removal agent, medicine (antibiotic), pesticide (formamido, chlormeform, borhalon, etc.), textile industry solvent, dye, explosive, propellant and organic intermediates (such as dimethyl hydrazine, N,N Dimethyl Formamide) and other raw materials.
Last Update：2022-01-01 10:34:21
124-40-3 - Safety
Open Data Verified Data
- This product is toxic, and its toxicity to animals: inhalation of dimethylamine for 2 hours, mice LCs0 3.7mg/L. The lowest concentration of dimethylamine which could affect the respiratory rate of rabbits was 0. 22mg/L. Inhaled dimethylamine 40 minutes, can change the flexor reflex of the lowest concentration of 0. 4mg/L. Human: olfactory threshold concentration 0. 0025 mg/L. Stimulation threshold 0. 05mg/L, reflex threshold 0. Ooo01 mg/L. The maximum allowable concentration in the workplace is 1 mg/m3. When operating should wear protective equipment, must protect the skin. Production equipment should be strict, to prevent running, run, drop, leakage.
- a pressure-resistant steel bottle is used for anhydrous dimethylamine, and a tank car or an iron drum is used for dimethylamine aqueous solution. Store in a cool and ventilated place, avoid contact with explosives or oxides, away from the fire source. During transportation, care should be taken to protect against inversion.
Last Update：2022-01-01 10:34:22
124-40-3 - Security information
Open Data Unverified Data
| dangerous goods mark | F ,Xn,C,F,T |
| hazard category code | 12-20-37/38-41-34-20/22-11-39/23/24/25-23/24/25-52/53-40-19 |
| safety instructions | 3-16-26-29-36/37/39-45-39-61 |
| dangerous goods transport number | UN 2924 3/PG 2 |
| WGK Germany | 2 |
| RTECS number | IP8750000 |
| F | 3 |
| auto-ignition temperature | 753 °F |
| TSCA | Yes |
| DOT Classification | 2.1 (Flammable gas) |
| HazardClass | 3 |
| PackingGroup | II |
| customs code | 29211100 |
| toxic substance data | 124-40-3(Hazardous Substances Data) |
| Toxicity | Acute oral LD50 for guinea pigs 340 mg/kg, mice 316 mg/kg, rats 698 mg/kg, rabbits 240 mg/kg (quoted, RTECS, 1985). |
Last Update：2024-04-16 09:16:45
124-40-3 - Preparation
Open Data Unverified Data
- Methanol and ammonia are mixed in a certain ratio, and at a certain temperature and pressure, activated alumina is used as a catalyst to synthesize a mixture of trimethylamine and 2., and then heat exchange, condensation, deamination, extraction, dehydration, Separation to obtain dimethylamine finished product. For details, see "Monomethylamine".
- methanol ammoniation. Methanol is used as raw material to react with ammonia, the reaction temperature is 425 ℃, the reaction pressure is 2.45 MPa, the catalyst is α-Al2O3, and crude monomethylamine, dimethylamine and trimethylamine are obtained by gas-phase catalytic reaction of methanol ammoniation, and then by pressure rectification, pure industrial products of monomethylamine, dimethylamine and trimethylamine are obtained respectively.
CH3OH NH3→CH3NH2 H2O
2CH3OH NH3→(CH3)2NH 2H2O
3CH3OH NH3→(CH3)3N 3H2O
Last Update：2024-04-16 09:16:59
124-40-3 - Security information
Open Data Unverified Data
| category | harmful gases |
| toxicity classification | highly toxic |
| acute toxicity | oral-rat LD50: 698 mg/kg; Oral-mouse LD50: 316 mg/kg |
| Stimulus data | eyes-rabbit 50 mg/5 min |
| explosive hazard characteristics | Mix open flame with air and explode when heated |
| flammability hazard characteristics | It is flammable in case of open flame, high temperature, and oxidant; combustion produces toxic nitrogen oxide smoke |
| storage and transportation characteristics | The warehouse is ventilated and dry at low temperature; it is stored separately from oxidants and acids |
| fire extinguishing agent | mist water, foam, carbon dioxide, carbon tetrachloride, dry powder |
| occupational standards | TWA 9 mg/m3; STEL 18 mg/m3 |
Last Update：2024-04-16 09:17:13
124-40-3 - Nature
Open Data Unverified Data
| physical and chemical properties | dimethylamine, molecular formula C2H7N, molecular weight 45.08. Simple structure:(CH3)2NH, gas at room temperature, with the smell of ammonia. Melting point -96 ℃, boiling point 7.4 ℃. Liquefaction state density (0/4 ℃)0.680g/cm3. Soluble in water, soluble in ethanol and ether. Easy to burn. It is weakly alkaline and reacts with hydrochloric acid to form hydrochloride with a certain melting point [(CH3)2NH · HCl](melting point 171 ℃). Toxic LD504.0g/kg (intravenous injection in rabbits). Preparation method: Methanol and ammonia are reacted under pressure to generate methylamine, trimethylamine and dimethylamine, which are then separated. Uses: Used in the preparation of drugs, dyes, detergents, pesticides and rubber vulcanization accelerators. |
| chemical properties | Colorless flammable gas or liquid, when high concentration or compressed liquefaction, it has a strong unpleasant ammonia odor, and when the concentration is very low, it has the stench of fish oil. Soluble in water, soluble in ethanol and ether. |
Last Update：2024-04-16 09:17:41
124-40-3 - Use
Open Data Unverified Data
- Used as a raw material for the production of drugs, dyes, pesticides, leather hair remover, rubber vulcanization accelerator, rocket propellant, etc.
- Dimethylamine is an important intermediate of pesticides. It can prepare fungicides, famethazon, famethazin, famethazin, famethazin, famethazone, antigerminide, dimethylimuron, insecticide anti-aphid, insecticide double, insecticide Monophane, dithiophane, herbicides chlortoluron, isoproterone, cyclosazin.
- It is mainly used as rubber vulcanization accelerator, leather hair remover, medicine (antibiotic), pesticide (forme, chlordimeform, herbicides and other herbicides), textile industry solvent, dye, explosive, propellant and dimethylhydrazine, N,N-dimethylformamide and other organic intermediates raw materials. Among them, dimethylamine consumed in dimethylformamide production accounts for 44.7% of the total consumption, pesticide production accounts for 38.9%, and pharmaceutical production accounts for 16.4%.
- used as basic organic chemical raw materials, solvents and additives
- Used as analytical reagent, acid gas absorbent, solvent and organic synthesis intermediate
- Determination of magnesium and zinc. Precipitation of zinc hydroxide and manganese hydroxide. Acid gas absorbent. Solvents. Test chloropicrin and carbon dioxide in the air. Preparation of organic synthesis intermediates, dimethyl dithiocarbamate, etc.
Last Update：2024-04-16 09:18:44
124-40-3 - Reference Information
| olfactory Threshold | 0.033ppm |
| Henry's Law Constant | 1.75(x 10-5 atm?m3/mol) at 25 °C (Christie and Crisp, 1967) |
| LogP | -0.274 at 25℃ |
| NIST chemical information | information provided by: webbook.nist.gov (external link) |
| EPA chemical substance information | information provided by: ofmpeb.epa.gov (external link) |
| Introduction | DMA(dimethylamine), also known as dimethylamine, is an organic compound, which is a colorless flammable gas or liquid, high concentration or compression liquefaction with ammonia odor, low concentration of fish oil odor, soluble in water, soluble in ethanol and ether, toxic. |
| preparation method | dimethylamine can be pressurized reaction of methanol and ammonia to produce methylamine, trimethylamine and dimethylamine, and then separated. |
| Use | used in the production of drugs, dyes, pesticides, leather hair removal agent, rubber vulcanization accelerator, rocket propellant and other raw materials dimethylamine is an important intermediate of pesticide, which can be used for the preparation of fungicides, forme bis, formesarsine, forme zinc, forme nickel, forme arsenic, bactericide, insecticides: Anti-pirimicarb, insecticidal double, insecticidal single, acarbose, Borer bolus, herbicide green Malon, Isoproturon, cycloazinone, fluron, etc. mainly used as rubber vulcanization accelerator, leather hair removal agent, medicine (antibiotic), pesticide (formamido, chlormeform, herbicide such as tarhalon), textile industry solvent, dye, explosive, propellant and dimethylhydrazine, N,N-dimethylformamide and other organic intermediates of raw materials. Dimethylformamide production consumption of dimethylamine accounted for 44.7% of the total consumption, pesticide production consumption accounted for 38.9%, pharmaceutical and other production consumption accounted for 16.4%. used as basic organic chemical raw materials, solvents and additives used as analytical reagents, acid gas absorbents, solvents and organic synthesis intermediates determination of magnesium and zinc. Precipitation of zinc hydroxide and manganese hydroxide. Acid gas absorbent. Solvent. Chloropicrin and carbon dioxide in air were examined. Organic synthesis intermediates, such as dimethyl dithiocarbamate preparation. |
| production method | methanol and ammonia are mixed in a certain proportion at a certain temperature and pressure, with activated alumina as catalyst, synthesis of A, two, three methylamine mixture, and then by heat exchange, condensation, deammoniation, extraction, dehydration, separation, dimethyl amine product. For details, see "monomethylamine". methanol amination method. The reaction temperature is 425 ℃, the reaction pressure is 2.45 MPa, the catalyst is α-Al2O3, and the crude monomethylamine, dimethylamine and trimethylamine are obtained by the gas phase catalytic reaction of methanol amination, after pressure distillation, the pure industrial products of single component, methyl amine, dimethyl amine and trimethyl amine were obtained. CH3OH NH3→CH3NH2 H2O2CH3OH NH3→(CH3)2NH 2H2O3CH3OH NH3→(CH3)3N 3H2O |
| category | hazardous gas |
| toxicity grade | high toxicity |
| Acute toxicity | oral-rat LD50: 698 mg/kg; Oral-mouse LD50: 316 mg/kg |
| stimulation data | eyes-rabbit 50 mg/5 |
| explosive hazard characteristics | open flame mixed with air, thermal explosion |
| flammability hazard characteristics | in case of fire, high temperature, oxidant flammable; toxic NOx smoke from combustion |
| storage and transportation characteristics | The warehouse is ventilated and dried at low temperature; Stored separately from oxidants and acids |
| fire extinguishing agent | water, foam, carbon dioxide, carbon tetrachloride, dry powder |
| Occupational Standard | TWA 9 mg/m3; Tel 18 mg/m3 |
| spontaneous combustion temperature | 753 ° F. |
| DOT Classification | 2.1 (Flammable gas) |
| toxic substance data | information provided by: pubchem.ncbi.nlm.nih.gov (external link) |
| immediate life-and health-threatening concentration | 500 ppm |
Last Update：2024-04-09 15:16:45
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View History
Raw Materials for 124-40-3
Downstream Products for 124-40-3
Phenylacetic acid
N,N-Dimethyl-1,3-propane diamine
N,N-Dimethylformamide
dimethylcarbamoyl chloride
Phenylacetonitrile
Thiobisethylamine
N,N-Dimethyl-1,3-propane diamine
N,N-Dimethylformamide
dimethylcarbamoyl chloride
Phenylacetonitrile
Thiobisethylamine