Toluene diisocyanate manufacturer Knowledge Thioacetamide Thioacetamide

Thioacetamide Thioacetamide

Thioacetamide structural formula

Structural formula

Business number 01CF
Molecular formula CH3CSNH2
Molecular weight 75.13
label

Ethanethioamide,

Acetothioamide,

Ethylthionamide;,

Qualitative analysis

Numbering system

CAS number:62-55-5

MDL number:MFCD00008070

EINECS number:200-541-4

RTECS number:AC8925000

BRN number:506006

PubChem number:24889097

Physical property data

1. Properties: colorless or white crystal. New products sometimes have a mercaptan smell and slightly absorb moisture.

2. Density (g/mL, 25/4℃): 1.37

3. Relative vapor density (g/mL, air=1): Uncertain

4. Melting point (ºC): 108-112(lit.)

5. Boiling point (ºC, normal pressure): Uncertain

6. Boiling point (ºC, 5.2 kPa): Uncertain

7. Refractive index: Uncertain

8. Flash point (ºC): Uncertain

9. Specific rotation (º ): Uncertain

10. Autoignition point or ignition temperature (ºC): Uncertain

11. Vapor pressure (kPa, 25ºC): Uncertain

12. Saturated vapor pressure (kPa, 60ºC): Uncertain

13. Heat of combustion (KJ/mol): Uncertain

14. Critical temperature (ºC): Uncertain

15. Critical pressure (KPa): Uncertain

16. Log value of oil-water (octanol/water) partition coefficient: Uncertain

17. Explosion upper limit (%, V/V): Uncertain

18. Explosion lower limit (%, V/V): Uncertain

19. Solubility: Solubility in water at 25°C 16.3g/100ml, ethanol 26.4g/100ml. Very slightly soluble in benzene and ether. Its aqueous solution is quite stable at room temperature or 50-60°C, but when hydrogen ions are present, it quickly generates hydrogen sulfide and decomposes

Toxicological data

None yet

Ecological data

None yet

Molecular structure data

1. Molar refractive index: 22.13

2. Molar volume (cm3/mol): 70.2

3. Isotonic specific volume (90.2K): 187.3

4. Surface tension (dyne/cm): 50.6

5. Polarizability (10-24cm3): 8.77

Compute chemical data

1. Reference value for calculation of hydrophobic parameters (XlogP): -0.3

2. Number of hydrogen bond donors: 1

3. Number of hydrogen bond acceptors: 1

p>

4. Number of rotatable chemical bonds: 0

5. Number of tautomers: 3

6. TopologyPolar surface area of ​​�� ions: 58.1

7. Number of heavy atoms: 4

8. Surface charge: 0

9. Complexity: 33

10. Number of isotope atoms: 0

11. Number of determined atomic stereocenters: 0

12. Number of uncertain atomic stereocenters: 0

13. Determine the 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

The aqueous solution is quite stable at room temperature or 50-60°C, but when hydrogen ions are present, hydrogen sulfide is quickly generated and decomposes. New products sometimes have a mercaptan smell and slightly absorb moisture.

Storage method

This product should be sealed and stored in a cool, dry place.

Synthesis method

1. Thioacetamide can be prepared by reacting acetonitrile with hydrogen sulfide, or by reacting acetamide with phosphorus pentasulfide.

2. First heat the solvent benzene to 70°C, then add industrial product acetamide and stir until completely dissolved. Then slowly add ground industrial product phosphorus pentasulfide under rapid stirring (the amount of acetamide is 5 times the calculated amount). The reaction solution continued to be heated until it changed from green to yellow. Stop stirring, carefully separate the yellow solution, cool and crystallize, let stand for 2 hours, filter, and dry the solid in the air. Distill the filtrate to remove 2/3 of the benzene, cool and crystallize, filter and combine with the solid obtained above to obtain the finished product. The resulting filtrate can also recover some products.
The process reaction formula is:

Purpose

1. Used in the production of catalysts, stabilizers, polymerization inhibitors, electroplating additives, photographic chemicals, pesticides, dyeing auxiliaries and mineral processing agents, etc. It is also used as vulcanizing agent, cross-linking agent, rubber additive and pharmaceutical raw material for polymers.

2. Used for qualitative analysis, replacing hydrogen sulfide gas as a grouping reagent.

This article is from the Internet, does not represent the position of Toluene diisocyanate reproduced please specify the source.https://www.chemicalchem.com/archives/23587

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