Epoxy curing agent Knowledge o-nitroaniline

o-nitroaniline

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O-nitroaniline structural formula

Structural formula

Business number 0200
Molecular formula C6H6N2O2
Molecular weight 138
label

1-amino-2-nitrobenzene,

2-nitroaniline,

2-Nitroaniline,

1-Nitro-2-aminobenzene,

Aromatic nitrogen-containing compounds and their derivatives

Numbering system

CAS number:88-74-4

MDL number:MFCD00007687

EINECS number:201-855-4

RTECS number:BY6650000

BRN number:509275

PubChem number:24886436

Physical property data

1. Character: orange-yellow needle-like crystal[1]

2. Melting point (℃): 73~76[2]

3. Boiling point (℃): 284.5[3]

4. Relative density (water=1): 1.44[4]

5. Relative vapor density (air=1): 4.77[5]

6. Saturated vapor pressure (kPa): 0.13 (104 ℃)[6]

7. Heat of combustion (KJ/mol): -3201.1[7]

8. Critical pressure (MPa): 4.42[8]

9. Octanol/water partition coefficient: 1.44~1.83[9]

10. Flash point (℃): 168[10]

11. Ignition temperature (℃): 521[11]

12. Solubility: Slightly soluble in cold water, soluble in hot water and ethanol, easily soluble in ether, acetone and benzene. [12]

Toxicological data

1. Acute toxicity[13]

LD50: 1600mg/kg (rat oral); 20000mg/kg (rabbit transdermal)

2. Irritation No information available

3. Mutagenicity[14] Microbial mutagenicity: Salmonella typhimurium 50μg/dish. DNA repair: Bacillus subtilis 5mg/dish. Micronucleus test: mice take 738 mg/kg orally. Cytogenetic analysis: hamster ovary 10mmol/L.

Ecological data

1. Ecotoxicity[15] LC50: 17mg/L (48h) (medaka)

2. Biodegradability No data yet

3. Non-biodegradability[16] In the air, when the hydroxyl radical concentration is 5.00×105/cm3, the degradation half-life is 1.2d (theoretical).

Molecular structure data

1. Molar refractive index: 37.03

2. Molar volume (cm3/mol): 103.5

3. Isotonic specific volume (90.2K ): 288.5

4. Surface tension (dyne/cm): 60.3

5. Dielectric constant: None available

6. Polarizability ( 10-24cm3): 14.68

7. Single isotope mass: 138.042927 Da

8. Nominal mass: 138 Da

9. Average mass: 138.124 Da

Compute chemical data

1. Hydrophobic parameter calculation reference value (XlogP): None

2. Hydrogen bond donor�Number of bonds: 1

3. Number of hydrogen bond acceptors: 3

4. Number of rotatable chemical bonds: 0

5. Tautomers Number: None

6. Topological molecule polar surface area 71.8

7. Number of heavy atoms: 10

8. Surface charge: 0

9. Complexity: 132

10. Number of isotope atoms: 0

11. Determine the number of atomic stereocenters: 0

12. Uncertain Number of atomic stereocenters: 0

13. Determined number of stereocenters of chemical bonds: 0

14. Uncertain number of stereocenters of chemical bonds: 0

15 .Number of covalent bond units: 1

Properties and stability

1. Stability[17] Stable

2. Incompatible substances [18] Acids, acid chlorides, acid anhydrides, chloroform, strong oxidizing agents, strong reducing agents

3. Conditions to avoid contact[19] Heating

4. Polymerization hazard[20] No polymerization

5. Decomposition products[21] Nitrogen oxides, ammonia

Storage method

Storage Precautions[22] Store in a cool, ventilated warehouse. Keep away from fire and heat sources. The packaging is sealed. They should be stored separately from oxidants, reducing agents, acids, and food chemicals, and avoid mixed storage. Equipped with the appropriate variety and quantity of fire equipment. Suitable materials should be available in the storage area to contain spills.

Synthesis method

Add o-nitrochlorobenzene into an autoclave containing a certain concentration of ammonia water, and perform ammonolysis at 185~190℃ and 4~4.5MPa to generate crude o-nitroaniline, which is then cooled, crystallized and filtered , that is, the finished product is obtained.

Purpose

1. Dye intermediates. It is used to prepare orange-based GR, the color base of ice dye dye, which is widely used in dyeing cotton and linen fabrics. Also used in the preparation of lakes. It is also used as a raw material for the production of the pesticide carbendazim, an anti-ash agent for photography, and an analytical reagent for measuring trace amounts of iodide.

2. Used as a dye intermediate, used in the synthesis of photographic anti-fog agents, and also used in the determination of trace iodides, the production of the pesticide carbendazim, etc. [23]

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