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EINECS 201-155-9
CAS No. 78-90-0 Density 0.863 g/cm3
PSA 52.04000 LogP 0.69290
Solubility SOLUBLE Melting Point -37 °C
Formula C3H10N2 Boiling Point 117.3 °C at 760 mmHg
Molecular Weight 74.1258 Flash Point 33.3 °C
Transport Information UN 2258 8/PG 2 Appearance A colorless liquid with an ammonia-like odor.
Safety 26-37/39-45 Risk Codes 10-21/22-35
Molecular Structure Molecular Structure of 78-90-0 (1,2-Diaminopropane) Hazard Symbols CorrosiveC


Article Data 57

1,2-Diaminopropane Specification

The CAS registry number of 1,2-Diaminopropane is 78-90-0. Its EINECS registry number is 201-155-9. The IUPAC name is propane-1,2-diamine. In addition, the molecular formula is C3H10N2 and the molecular weight is 74.12. It is also called 1-methyl-1,2-diaminoethane. What's more, it is a kind of clear liquid and belongs to the classes of Intermediates of Dyes and Pigments; Aliphatics; Amines; Isotope Labeled Compounds. And it should be stored in a cool and dry place.

Physical properties about this chemical are: (1)ACD/BCF (pH 5.5): 1; (2)ACD/BCF (pH 7.4): 1; (3)ACD/KOC (pH 5.5): 1; (4)ACD/KOC (pH 7.4): 1; (5)#H bond acceptors: 2; (6)#H bond donors: 4; (7)#Freely Rotating Bonds: 3; (8)Polar Surface Area: 52.04 Å2; (9)Index of Refraction: 1.448; (10)Molar Refractivity: 22.97 cm3; (11)Molar Volume: 85.7 cm3; (12)Polarizability: 9.1 ×10-24cm3; (13)Surface Tension: 33.8 dyne/cm; (14)Density: 0.863 g/cm3; (15)Flash Point: 33.3 °C; (16)Enthalpy of Vaporization: 35.56 kJ/mol; (17)Boiling Point: 117.3 °C at 760 mmHg; (18)Vapour Pressure: 17.5 mmHg at 25°C.

Preparation of 1,2-Diaminopropane: it can be prepared by 1,2-dichloropropane and ammonia through amination reaction. Add dichloropropane and ammonia into reactor. The reaction temperature should be controlled about 150 °C. And the reaction pressure should be maintained at 2.45MPa. Then through the operation of neutralization, enrichment, desalination and distillation you can get the product. The yield is about 65-70%. The equation is as follows:

1,2-Diaminopropane can be prepared by 1,2-dichloropropane and ammonia through amination reaction

Uses of 1,2-Diaminopropane: this chemical can be used as resin curing agent, rubber sulfide accelerator, mineral processing reagents, metal passivation agent and analysis reagent. And it can be used in the production of 1,2-propyldiaminetetraacetic acid in pharmaceutical industry. In addition, it can react with 2-methyl-4,5-dihydro-1H-imidazole to get 2,4-dimethyl-4,5-dihydro-1H-imidazole. The yield is about 82% by heating.

1,2-Diaminopropane can react with 2-methyl-4,5-dihydro-1H-imidazole to get 2,4-dimethyl-4,5-dihydro-1H-imidazole

When you are using this chemical, please be cautious about it as the following:
This chemical is flammable and can cause severe burns. And it is harmful by inhalation and in contact with skin. During using it, wear suitable gloves and eye/face protection. In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. And in case of accident or if you feel unwell, seek medical advice immediately (show the label whenever possible.).

You can still convert the following datas into molecular structure:
(2)InChI: InChI=1/C3H10N2/c1-3(5)2-4/h3H,2,4-5H2,1H3

The toxicity data is as follows:

Organism Test Type Route Reported Dose (Normalized Dose) Effect Source
mouse LD50 intraperitoneal 593mg/kg (593mg/kg)   Yakugaku Zasshi. Journal of Pharmacy. Vol. 97, Pg. 1117, 1977.
rabbit LD50 skin 500uL/kg (0.5mL/kg)   AMA Archives of Industrial Hygiene and Occupational Medicine. Vol. 10, Pg. 61, 1954.
rat LD50 oral 2230mg/kg (2230mg/kg)   Union Carbide Data Sheet. Vol. 3/12/1969,
rat LDLo subcutaneous 909mg/kg (909mg/kg)   Zeitschrift fuer Experimentelle Pathologie und Therapie. Vol. 17, Pg. 59, 1915.

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