4,4'-Methylenedianiline CAS 101-77-9

4,4'-Methylenedianiline - Names and Identifiers

4,4'-Methylenedianiline - Physico-chemical Properties

4,4'-Methylenedianiline - Risk and Safety

4,4'-Methylenedianiline - Upstream Downstream Industry

4,4'-Methylenedianiline - Introduction

Chemical properties White to yellowish brown flake crystals. Soluble in hot water, ethanol, ether, benzene.

Use as an analytical reagent and also used in organic synthesis

Uses are mainly used in rubber products such as tires, sidewalls, plies, inner tubes, conveying tubes, hoses, and V-belts

Uses used in the production of insulating materials, dyes, diisocyanates, polyurethane rubber, H-grade adhesives, epoxy resin curing agents, etc.; epoxy resin curing agents, rubber antioxidants and antioxidants, synthetic MDI intermediates, It is also used to determine tungsten and sulfate.

Uses are mainly used to manufacture polymer materials such as epoxy resin, polycarbonate, polysulfone resin, phenolic unsaturated resin, polyetherimide, etc., and can also be used to manufacture polyvinyl chloride heat stabilizers, Plasticizers, rubber antioxidants, agricultural fungicides, paints, ultraviolet absorbers

Use to manufacture dyes, determine tungsten and sulfate, rubber antioxidants and antioxidants.

Category Toxic

Toxic graded poisoning

acute toxicity oral-rat LD50: 662 mg/kg; Oral-mouse LD50: 745 mg/kg

stimulation data eye-rabbit 100 mg/24 hours moderate

Flammability hazard characteristics Open flame is flammable; heated to release toxic nitrogen oxide gas

Storage and transportation characteristics The warehouse is ventilated and dry at low temperature; stored and transported separately from food raw materials

Extinguishing agent water, carbon dioxide, sand, foam

occupational standard TWA 0.8 mg/m3; STEL 4.0 mg/m3

4,4'-Methylenedianiline - Introduction

Nature :
1. It is a solid compound that appears white to light yellow.
2. It is a relatively stable compound with high melting and boiling points.
3. It has low solubility in water, but good solubility in organic solvents.

Usage:
1. Mainly used as an intermediate in polyimide resins.
2. This compound is commonly used as a crosslinking agent for hard polyurea formaldehyde resins in industry, for the preparation of high-temperature and corrosion-resistant industrial coatings, adhesives, and plastics.

Method:
Usually formed by the reaction of aniline and formaldehyde under alkaline conditions. Firstly, aniline is oxidized to resorcinol in alkaline solution. Then, resorcinol undergoes a condensation reaction with formaldehyde to produce the target product 4,4 '- diaminodiphenylmethane. The reaction process should be carried out under appropriate temperature and pH conditions.

Informations de sécurité :
1. Has high toxicity and carcinogenicity.
2. Long term exposure or inhalation of this compound may pose a health hazard.
3. During use, it is necessary to strictly follow safety operating procedures, wear personal protective equipment, and ensure good ventilation.
4. Avoid contact with skin and avoid inhaling its vapors.
5. When storing and handling this compound, it should be kept away from fire and heat sources to avoid fire and explosion accidents.