Ammonium carbonate

inorganic salt

Collection

zero Useful+1

zero

synonym (nh4)2co3 ((nh4) 2co3) generally refers to ammonium carbonate

This entry is made by Compilation and application of scientific encyclopedia entries of "Science Popularization China" to examine.

Ammonium carbonate is a kind of inorganic compound , the chemical formula is (NH four ) two CO three 。 It is a colorless cubic crystal, easily soluble in water, and the aqueous solution is alkaline, insoluble in ethanol 、 carbon disulfide and Concentrated ammonia water 。 Unstable to light and heat, slightly hygroscopic.

Chinese name: Ammonium carbonate^[4]
Foreign name: Ammonium carbonate^[4]
chemical formula: (NH four ) two CO three
molecular weight: ninety-six point zero eight six^[4]
CAS login number: 506-87-6^[4]
EINECS login number: 208-058-0
Melting point: 58 ℃^[4]
Water solubility: Soluble

Density: 1.50 kg/m³
Appearance: White powder
Security description: S24/25
Hazard symbol: Xn^[4]
Hazard description: R22；R52/53
UN dangerous goods number: nine thousand and eighty-four^[4]
Regulatory information: This product is not controlled
Storage: Sealed, cool and dark storage

catalog

seven security information
eight Storage and transportation conditions

Physical and chemical properties

Announce

edit

physical property

Melting point: 58 ℃

Density: 1.50g/cm three

logP：0.546

Refractive index: 1.4616

Steam pressure: 2.58E-05mmHg at 25 ° C

Appearance: white powder

Solubility: soluble in water, insoluble in ethanol, carbon disulfide and concentrated ammonia water.

chemical property

1. Obvious decomposition at room temperature:

2. Reaction with acid:

3. Reaction with alkali:^{[5 ]}

4. React with some salts:

Preparation method

Announce

edit

1. By ammonia And carbon dioxide It is cooled and crystallized by water:

2. By ammonium sulphate And calcium carbonate The suspension of

3. Urea will gradually react with water in aqueous solution to produce ammonium carbonate:

application area

Announce

edit

1. Drip analysis lithium 、 radium and thorium And carbonate synthesis. It is also used as fertilizer, fire extinguishing agent, detergent, medicine, rubber, fermentation and other industries.

2. It is used as raw material of fermentation powder, various ammonium salts, buffer, printing and dyeing auxiliary, fertilizer and analytical reagent.

3. Edible ammonium carbonate is used as buffer, neutralizer, leavening agent and fermentation promoter (for making wine).

4. Ammonium carbonate is used in sulfosalicylic acid silver plating electrolyte, but heavy metals, sulfur and Thiocyanate Otherwise, the anode is easy to blacken. In addition, ammonium carbonate is also used to remove cadmium 、 nickel And other plating solutions.

Molecular structure data

Announce

edit

1. Molar refractive index: 9.78

2. Molar volume (cm three /mol）：37.1

3. Isotonic specific volume (90.2K): 110.4

4. Surface tension (dyne/cm): 77.9

5. Polarization (10 -24 cm three ）：3.87^[2]

Calculate chemical data

Announce

edit

1. Reference value for drainage parameter calculation (XlogP): None

2. Number of hydrogen bond donors: 3^[4]

3. Number of hydrogen bond receptors: 4^[4]

4. Number of rotatable chemical bonds: 0^[4]

5. Number of tautomers:

6. Topological molecule polar surface area (TPSA): 58.5^[4]

7. Number of heavy atoms: 5^[4]

8. Surface charge: 0^[4]

9. Complexity: 26.3^[4]

10. Number of isotope atoms: 0^[4]

11. Determine the number of atomic structure centers: 0^[4]

12. Number of uncertain atomic structure centers: 0^[4]

13. Determine the number of chemical bond structure centers: 0^[4]

14. Number of uncertain chemical bond structure centers: 0^[4]

15. Number of covalent bond units: 2^[1]

toxicology data

Announce

edit

acute toxicity

Intravenous LD in mice fifty : 96mg/kg, convulsion or epilepsy, respiratory irritation;

Intravenous LDLo in dogs: 200 mg/kg;

Rabbit subcutaneous LDLo: 900mg/kg;

Rabbit intravenous LDLo: 200 mg/kg;

Rabbit transrectal LDLo: 800mg/kg;

Frog subcutaneous LDLo: 250mg/kg;

Frog parenteral LDLo: 758mg/kg.

security information

Announce

edit

Dangerous goods mark: Xn

Hazard category code: 22-52, 53

Safety instructions: 24/25

Transport No. of dangerous goods: UN 9084

WGK Germany：1

RTECS：BP1925000^[3]

Storage and transportation conditions

Announce

edit

1. Store in a cool, dry and well ventilated warehouse. Keep away from kindling and heat sources. Protect from direct sunlight. Packing and sealing.

2. It shall be stored separately from acids and edible chemicals, and mixed storage is strictly prohibited. The storage area shall be equipped with appropriate materials to contain leakage.

Novice on the road

Growth task Getting Started with Editing Edit Rule Edit by myself

I have questions

Content query Online Service Official post bar Feedback

Complaints and suggestions

Report bad information Failed to appeal through entries Complaint of infringement information Blocking query and unblocking

Jinggong Network Anbei No. 1100000200001