Дипентиламин

Description

Dipentylamine (di-n-amylamine, diamylamine) belongs to the class of secondary aliphatic amines - two pentyl substituents at the nitrogen atom. Di-n-amylamine looks like a clear, colorless liquid with a characteristic ammonia odor, very slightly soluble in water, less dense than water, vapors heavier than air; difficult to ignite, moderately toxic, contact with liquid can cause chemical burns, vapors irritate the respiratory tract. Used in the production of rubber, synthetic resins and dyes. In industry, the substance is also used as a rubber vulcanization accelerator, a flotation reagent, a component of dye formulations, a corrosion inhibitor and a solvent for oils, resins and some cellulose ethers.

Basic Attributes

• CAS No.: 2050-92-2
• Chemical formula: C10H23N
• Molecular Weight: 157.296
• Exact weight: 157.30
• EU number: 218-108-3
• UNII: D67I8PN8UU
• ICSC number: 0537
• NSC Number: 6329
• UN number: 2841
• DSSTox ID: DTXSID4024931
• HS code: 2921199090
• PSA: 12.03
• XLogP3: 3.82

Physico-chemical characteristics

• Color/form: colorless to water-white or pale yellow liquid
• Density: 0.7771 g/cm3 at 20 °C
• Melting point: −7.85 °C
• Boiling point: 202.5 °C
• Flash point: 52.2±0.0 °C, according to other sources 124 °F
• Refractive index: 1.427
• Solubility in water: slightly soluble (0.1–1 g/100 ml)
• Steam pressure: 0.3 mmHg Art. at 20 °C
• Vapor density: 5.42 relative to air
• Odor: characteristic amine
• Dissociation constant: pKa = 11.16 (conjugate acid)
• Molar volume of liquid: 0.203 cubic m/kmol

Chemical reactivity

Reactive group: amines, phosphines and pyridines. Neutralizes acids to form salts and water. May be incompatible with isocyanates, halogenated organics, peroxides, acid phenols, epoxides, anhydrides and acid halides. With strong reducing agents such as hydrides, forms flammable hydrogen gas. No flammability limits have been reported. Highly flammable, sensitive to air and heat.

Scope of application

Secondary aliphatic amine, used in the production of rubber, synthetic resins and dyes; serves as a rubber vulcanization accelerator, flotation reagent, component of dye formulations, corrosion inhibitor, solvent for oils, resins and some cellulose ethers.

Safety Information

• Packing level: III
• Hazard category: 3.2
• Transport codes: UN 2841, 3/page. 3
• WGK Germany: 3
• Hazard class code: R23/24/25; R34
• Safety instructions: S26-S27-S36/37/39-S45
• RTECS number: RZ9100000
• Tags: T (toxic)
• Stability: stable, but sensitive to air; highly flammable; incompatible with oxidizing agents
• Precautions: P261, P273, P280, P301+P310, P305+P351+P338, P310
• Hazard statements: H301+H311+H331, H314, H400
• GHS classification: H226 (flammable liquids and vapours, 40.91% share in notifications from 66 companies out of 4 notifications to the ECHA C&L register)

Actions in case of accident

Easily ignited by heat, sparks or flames, vapors may form explosive mixtures with air and migrate towards the ignition source (ERG 131). Vapors are heavier than air and accumulate in low places - sewers, basements, tanks. At temperatures above 51 °C, explosive mixtures of steam and air may form. Isolate the spill area to at least 50 m (150 ft) in all directions; in case of a tank fire, evacuate to 800 m (1/2 mile).

Storage and transportation conditions

Store away from sources of heat, sparks and open flames, in a cool, dry, well-ventilated area, in a flammable area, and keep container tightly closed. Transport according to UN code 2841, hazard category 3.2, packing group III.

Full aggregated list of P-phrases according to ECHA C&L (66 companies, 4 notifications): P210, P233, P240, P241, P242, P243, P260, P261, P264, P270, P271, P273, P280, P301+P310, P301+P312, P301+P330+P331, P302+P352, P303+P361+P353, P304+P340, P305+P351+P338, P310, P311, P312, P321, P322, P330, P332+P313, P337+P313, P361, P362, P363, P370+P378, P391, P403+P233, P403+P235, P405, P501.