Sodium stearate

Organic compound

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synonym Sodium stearate (Sodium stearate) generally refers to sodium stearate

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

Sodium stearate is a kind of Organic compound , chemical formula is C seventeen H thirty-five COONa， White oily powder, with greasy feeling and fat smell. Easily soluble in hot water or hot alcohol. The aqueous solution is alkaline due to hydrolysis, and the alcohol solution is neutral. Composed of octadecanoic acid and sodium hydroxide It is made by interaction. It is used in toothpaste manufacturing, as well as as waterproof agent and plastic stabilizer.^[1]

Chinese name: Sodium stearate
Foreign name: Sodium stearate
Alias: Sodium stearate
chemical formula: C seventeen H thirty-five COONa
molecular weight: three hundred and six point four six
CAS login number: 822-16-2^[2]
EINECS login number: 212-490-5^[2]

Melting point: 245 to 255 ℃^[3]
Boiling point: 359.4 ℃^[3]
Density: 1.103 g/cm³^[3]
Appearance: White oily powder
Flash point: 162.4 ℃^[3]
Application: Waterproof agent and plastic stabilizer
English alias: Stearic acid Sodium Salt；Octadecanoic acid sodium salt

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Numbering system

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CAS No.: 822-16-2

MDL No.: MFCD00036404

EINECS No.: 212-490-5

RTECS No.: WI4725000

BRN No.: 3576813^[2]

Physical and chemical properties

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Character: white powder, with fat smell and a sense of smoothness.

Density: 1.103g/cm three

Melting point: 245~255 ℃

Boiling point: 359.4 ℃ at 760mmHg

Flash point: 162.4 ℃

Solubility: Easily soluble in hot water and hot ethanol, slowly soluble in cold water and cold ethanol. Insoluble in ether, light gasoline, acetone and similar organic solvents. It is also insoluble in salt and sodium hydroxide etc. electrolyte solution 。^[2-3]

Preparation method

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1. Set stearic acid Add it into the reaction kettle, heat it to melt, add NaOH aqueous solution under stirring, heat it at 65 ℃ for 2h, and control the pH value at 8.0~8.5. Spray dried product.

2. Dissolve 10g stearic acid in 100mL 95% ethanol, titrate with 0.5mol/L sodium hydroxide ethanol solution, use phenolphthalein as indicator, titrate to the equivalent point, and then filter out the precipitated sodium stearate soap. The crude product can be recrystallized with 95% ethanol to obtain a pure product.^[2]

application area

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1. It is used in the manufacture of toothpaste and Waterproof agent , plastic stabilizer. be used as Metal heat treatment And plastic stabilizer for manufacturing Soap detergent As an emulsifier in cosmetics.

2. Mainly used for making soap Detergent 。 In block soaps, it can be used as an active agent, an excipient, an emulsifier for cosmetics, and an emulsifier for O/W products.^[2]

Detergent : Used to control foam during rinsing. (Sodium stearate is the main component of soap)

Emulsifier or dispersant : Moderate emulsification and antioxidant for polymers.

Corrosion inhibitor : The polyethylene packaging film has protective properties.

Cosmetics : Shaving gel, transparent viscose, etc

adhesive : used as natural glue and then pasted paper.

toxicology data

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Minimum lethal dose (dog, vein) LD fifty ：10mg/kg^[2]

Calculate chemical data

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

2. Number of hydrogen bond donors: 0

3. Number of hydrogen bond receptors: 2

4. Number of rotatable chemical bonds: 16

5. Number of tautomers: none

6. Topological molecular polar surface area: 40.1

7. Number of heavy atoms: 21

8. Surface charge: 0

9. Complexity: 207

ten Isotope atom Quantity: 0

11. Determine the number of atomic structure centers: 0

12. Number of uncertain atomic structure centers: 0

13. Determine the number of chemical bond structural centers: 0

14. Number of indeterminate chemical bond structure centers: 0

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

Storage method

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Keep container sealed and store in a cool and dry place.^[2]

First aid measures

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Inhalation: If inhaled, move the patient to fresh air.

Skin contact: Take off the contaminated clothes and wash the skin thoroughly with soapy water and clean water. If you feel unwell, seek medical advice.

Eye contact: separate the eyelids and use flowing water or normal saline rinse. Get medical attention immediately.

Ingestion: Rinse mouth, do not induce vomiting. Get medical attention immediately.

Advice for protecting the rescuer: transfer the patient to a safe place. Consult a doctor. Show this chemical safety data sheet to the doctor on site.

security information

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S24/25Avoid contact with skin and eyes.

Avoid contact with skin and eyes.

Customs code: 2915709000

WGK Germany：1

Safety instructions: S24/25

RTECS No.: WI4725000

Dangerous transport code: UN 3077 9/PG 3^[2]

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