-
Categories
-
Pharmaceutical Intermediates
-
Active Pharmaceutical Ingredients
-
Food Additives
- Industrial Coatings
- Agrochemicals
- Dyes and Pigments
- Surfactant
- Flavors and Fragrances
- Chemical Reagents
- Catalyst and Auxiliary
- Natural Products
- Inorganic Chemistry
-
Organic Chemistry
-
Biochemical Engineering
- Analytical Chemistry
- Cosmetic Ingredient
-
Pharmaceutical Intermediates
Promotion
ECHEMI Mall
Wholesale
Weekly Price
Exhibition
News
-
Trade Service
1.
Carbon halides and oxyhalides
Carbon halides mainly include CF 4 (colorless liquid gas), CCl 4 (colorless liquid), CBr 4 (light yellow solid), CI 4 (red solid), and the most important one is carbon tetrachloride CCl 4
.
The stability of carbon tetrahalides decreases as the halogen radius increases
CF 4 has high thermal stability and chemical inertness
.
It can be used for water repellency and dyeing resistance of paper, fabric and fiber after being combined with other groups
CCl 4 is an important non-protic, non-polar, non-aqueous solvent
.
It can be obtained by the reaction of CH 4 and Cl 2 at 440°C
CH 4 +4Cl 2 =CCl 4 +4HCl
CCl 4 has a low boiling point (76.
8°C), is toxic, and is easily volatilized.
It can isolate combustibles from air but does not react with oxygen.
Therefore, CCl 4 can be used as a fire extinguishing agent and flame retardant
.
CCl 4 is an important chlorination reagent
COCl 2 is a colorless gas, which is rapidly hydrolyzed in water to generate CO 2 and HF
.
The main purpose of COF 2 is to prepare fluorine-containing organic compounds
COCl 2 is a colorless gas and highly toxic
.
Initially synthesized by CO and Cl 2 under light, it is called phosgene
2.
Carbon sulfide
The most important are carbon sulfide disulfide the CS 2 , mucus can be used to produce wire and carbon tetrachloride
.
Other sulfides of carbon have poor stability, such as CS (colorless gas) and C 3 S 2 (red liquid, decomposed at 90°C)
CS 2 is a colorless liquid, an aprotic, non-polar, non-aqueous solvent
.
CS 2 can be prepared by passing sulfur vapor through red hot charcoal or by reacting natural gas with sulfur vapor at high temperature
CS2 has a low boiling point (46.
25°C), is volatile, highly toxic, and can cause serious damage to the human nervous system and brain
.
Pure CS2 has a pleasant fragrance
.
CS2 has reducibility, can reduce MnO4-, and spontaneously ignite at 100°C
.
The CS 2 is acidic sulfide, with K 2 Reaction S alkaline substance
.
CS 2 +K 2 S=K 2 CS 3 (potassium thiocarbonate)
Related links: Carbonic acid and its salts
