Overview
3-Dimethylaminopropylamine (CAS 109-55-7 ), commonly abbreviated as DMAPA, is a bifunctional diamine used as a reactive intermediate and process chemical across specialty chemical manufacturing.
It combines a primary and a tertiary amine in a single molecule, making it a building block for synthesizing surfactants, polymers, and active ingredients for various industrial applications.
In personal care, it is the key reactant in producing cocamidopropyl betaine, the amphoteric surfactant found in shampoos, body washes, and mild cleansing formulations for consumer use.
Pharmaceutical manufacturers use it as an intermediate in synthesizing active compounds and as a pH-buffering agent in formulation chemistry to ensure stability and efficacy of the final product.
In polymer chemistry, it functions as a curing agent and chain extender for epoxy systems and polyurethane coatings. It also serves as a corrosion inhibitor precursor and stabilizer additive.
This chemical is supplied as a clear to slightly yellow liquid in standard drum and IBC quantities, with bulk tanker options available for high-volume buyers and large-scale operations.
Technical grade is the most common commercial specification, though higher-purity grades are available to meet pharmaceutical intermediate requirements and specific manufacturing standards.
Buyers should confirm amine content and water specification when sourcing for surfactant synthesis, where consistent purity directly affects downstream yield and overall product quality.
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Physical Properties
| Melting Point | -70 °C |
| Boiling Point | 123 °C |
| Density | 0.8100 g/cm³ @ Temp: 30 °C |
| Flash Point | 90 °F |
| Appearance | clear liquid |
| Color | Clear |
| Odor | ammoniacal odor |
| Form | Liquid |
| Water Solubility | SOLUBLE |
| Vapor Pressure | 5 mm Hg ( 20 °C) |
| Refractive Index | n 20/D 1.435(lit.) |
| pH | 12.7 (100g/l, H2O, 20℃) |
| Log P | -0.352 at 25℃ |
Safety & Handling
Danger GHS02 GHS05 GHS07 GHS06 GHS08 Hazard Statements H226 Flammable liquid and vapor H302 Harmful if swallowed H311 Toxic in contact with skin H312 Harmful in contact with skin H314 Causes severe skin burns and eye damage H317 May cause an allergic skin reaction H318 Causes serious eye damage H335 May cause respiratory irritation H373 May causes damage to organs through prolonged or repeated exposure H402 Harmful to aquatic life H412 Harmful to aquatic life with long lasting effects H302+H312 Harmful if swallowed or in contact with skin Precautionary Statements P210 Keep away from heat, hot surfaces, sparks, open flames and other ignition sources. No smoking. P233 Keep container tightly closed. P240 Ground and bond container and receiving equipment. P241 Use explosion-proof [electrical/ventilating/lighting/…] equipment. P242 Use non-sparking tools. P243 Take action to prevent static discharges. P260 Do not breathe dust/fume/gas/mist/vapours/spray. P261 Avoid breathing dust/fume/gas/mist/vapours/spray. P262 Do not get in eyes, on skin, or on clothing. P264 Wash … thoroughly after handling. P270 Do not eat, drink or smoke when using this product. P271 Use only outdoors or in a well-ventilated area. P272 Contaminated work clothing should not be allowed out of the workplace. P273 Avoid release to the environment. P280 Wear protective gloves/protective clothing/eye protection/face protection. P316 Get emergency medical help immediately. P317 Get emergency medical help. P319 Get medical advice/attention if you feel unwell. P321 Specific treatment (see … on this label). P330 Rinse mouth. P363 Wash contaminated clothing before reuse. P405 Store locked up. P501 Dispose of contents/container in accordance with local regulations. P264+P265 Wash … thoroughly after handling. P301+P317 Get emergency medical help. P302+P352 IF ON SKIN: Wash with plenty of water. P304+P340 IF INHALED: Remove person to fresh air and keep comfortable for breathing. P333+P317 Get emergency medical help. P361+P364 Take off immediately all contaminated clothing and wash it before reuse. P362+P364 Take off contaminated clothing and wash it before reuse. P370+P378 Use … for extinction. P403+P233 Store in a well-ventilated place. Keep container tightly closed. P403+P235 Store in a well-ventilated place. Keep cool. P301+P330+P331 Rinse mouth. Do NOT induce vomiting. P302+P361+P354 IF ON SKIN: Take off immediately all contaminated clothing. Rinse skin with water/shower. P303+P361+P353 IF ON SKIN (or hair): Take off immediately all contaminated clothing. Rinse skin with water/shower. P305+P354+P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.
Trade & Regulatory
| HS Code | 29212900 |
| UN Number | 2733 |
| ADR Class | 3 |
| Packing Group | III |
| Storage Class | 3 - Flammable liquids |
| WGK (Germany) | 2 |
Other Names
Related Products
Chemical Properties
- CAS Number
- 109-55-7
- EC Number
- 203-680-9
- Mol. Weight
- 102.18
- HS Code
- 29212900
- Category
- Flavors & Fragrances