Pyrogallol

Structural formula

• Numbering system
• Physical property data
• Toxicological data
• Ecological data
• Molecular structure data
• Computing chemical data
• More
  • Properties and Stability
  • Storage method
  • Synthesis method
  • Purpose

Numbering system

CAS number:87-66-1

MDL number:MFCD00002192

EINECS number:201-762-9

RTECS number:UX2800000

BRN number:907431

PubChem number:24898098

Physical property data

1. Properties: White odorless crystals. Has a bitter taste. Turns gray when exposed to air and light. Slowly heat and begin to sublimate. When exposed to air, the aqueous solution darkens in color, while its caustic solution changes color quickly and is low in toxicity.

2. Density (g/mL, 20/4℃): 1.45

3. Relative density (20℃, 4℃): 1.453⁴

4. Melting point (ºC): 131~133

5. Boiling point (ºC, normal pressure): 309℃ (1.01kpa)

6. Normal temperature Refractive index (n²⁵): 1.561¹³⁴

7. Refractive index _(n¹³⁴_D): 1.561

8. Flash point (ºC): Undetermined

9. Specific rotation (º): Undetermined

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

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

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

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

14. Critical temperature (ºC): Undetermined

15. Critical pressure (KPa): Undetermined

16. Log value of oil-water (octanol/water) distribution coefficient: Undetermined

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

18. Lower explosion limit (%, V/V): Undetermined

19. Solubility: Soluble in water, ethanol, ether, slightly soluble in benzene , chloroform, carbon disulfide.

Toxicological data

It is highly irritating to skin and mucous membranes, direct contact with skin should be avoided. When this product is swallowed, it can cause severe damage to the digestive organs, liver, and kidneys, leading to hemolysis, lethargy, collapse, and even death. The oral lethal dose for dogs is 23mg/kg.

Ecological data

None yetPolymerizing agents, pharmaceutical and dye intermediates, and analytical reagents, etc. Pyrogallic acid is used as an oxygen absorber in gas analysis, and in cosmetics, it is used in face powder, hair conditioners, hair dyes, etc. Used as polymerization inhibitor for styrene and polystyrene. It is also used to prepare metal colloidal solutions, film developers, infrared photography thermosensitizers, medicines and dyes, etc. It is used as an oxygen absorber in gas analysis and used in cosmetics such as face powder, hair conditioner, hair dye, etc. 2.Used as a reducing agent for the determination of gold by gravimetric method, an absorbent for oxygen in the determination of gases by absorption volume method, and a photometric method for the determination of NbO₃^– TaO₃^– chromogen. Also used for qualitative testing, Bi³⁺, La³⁺, Co²⁺, Ce⁴⁺, etc. . 3.Used as polymerization inhibitor for styrene, polystyrene and some polymer base materials. It is also used to prepare metal colloidal solutions, film developers, infrared photography thermosensitizers, medicines and dyes, etc. It is used as an oxygen absorber in gas analysis; in cosmetics, it is used in face powder, hair conditioner, hair dye, etc. 4.Widely used in pharmaceutical, dye, chemical and food industries. In the cosmetics industry, it can be used as an oxidative colorant for hair dyeing. It is a toxic substance that is easily effective and mutagenic. Its maximum allowable content is 5%, but it cannot dye eyelashes and eyebrows. Rinse immediately after contact with eyes. It can also be used in face powders and hair conditioners. 5. Used in the manufacture of azo dyes, anthraquinone dyes, etc.