Basic information
- Name:
Pyrogallol
- CAS No.:
87-66-1
- Molecular Structure:
- Formula:
- C6H6O3
- Molecular Weight:
- 126.12
- Synonyms:
- Fourrine PG;NSC 5035;Pyrogallicacid;Pyrogallol (8CI);1,2,3-Trihydroxybenzene;2,3-Dihydroxyphenol;Benzene-1,2,3-triol;C.I. 76515;C.I. Oxidation Base 32;Fouramine Brown AP;Fourrine 85;
- EINECS:
- 211-207-2
- Density:
- 1.488 g/cm3
- Melting Point:
- 43-47 °C(lit.)
- Boiling Point:
- 309 °C at 760 mmHg
- Flash Point:
- 164.4 °C
- Solubility:
- 400 g/L (25 °C) in water
- Appearance:
- white crystalline solid
- Hazard Symbols:
Xn- Risk Codes:
- 20/21/22-52/53-68-40
- Safety Description:
- 22-24/25-61-36/37 Details
- Transport Information:
- UN 2811 6.1/PG 3
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Chemistry
Molecular structure of Pyrogallol (CAS NO.87-66-1) is:
Product Name: Pyrogallol
CAS Registry Number: 87-66-1
IUPAC Name: benzene-1,2,3-triol
Molecular Weight :126.11004 [g/mol]
Molecular Formula: C6H6O3
XLogP3: 0.5
H-Bond Donor: 3
H-Bond Acceptor: 3
EINECS: 211-207-2
Melting Point: 43-47 °C(lit.)
Surface Tension: 78.6 dyne/cm
Density: 1.488 g/cm3
Flash Point: 164.4 °C
Enthalpy of Vaporization: 57.17 kJ/mol
Boiling Point: 309 °C at 760 mmHg
Vapour Pressure: 0.000361 mmHg at 25 °C
Refractive index: n20/D 1.387
Water Solubility: 400 g/L (25 °C)
Sensitive: Light Sensitive
Stability: Stability Stable, but decolourises in light. Combustible. Incompatible with strong oxidising agents, alkalies, metal oxides, ammonia, antipyrine, phenol, iodine, lime water, menthol, potassium permanganate, strong bases.
Product Categories: FINE Chemical & INTERMEDIATES;Aromatic Hydrocarbons (substituted) & Derivatives
Uses
Pyrogallol (CAS NO.87-66-1) can be used in hair dying, dying of suturing materials and for oxygen absorption in gas analysis. but pyrogallol is not likely to be used as a modern hair dye due to the suspected toxicity of the compound.It also has antiseptic properties. It was also used as a developing agent in black-and-white developers, but its use is largely historical except for special purpose applications. When in alkaline solution, it absorbs oxygen from the air, turning purple from a colourless solution. It can be used in this way to calculate the amount of oxygen in air.
Toxicity Data With Reference
| Organism | Test Type | Route | Reported Dose (Normalized Dose) | Effect | Source |
|---|---|---|---|---|---|
| bird - wild | LD50 | oral | 75mg/kg (75mg/kg) | Archives of Environmental Contamination and Toxicology. Vol. 12, Pg. 355, 1983. | |
| dog | LDLo | intravenous | 80mg/kg (80mg/kg) | "Handbook of Toxicology," 4 vols., Philadelphia, W.B. Saunders Co., 1956-59Vol. 1, Pg. 254, 1955. | |
| dog | LDLo | oral | 25mg/kg (25mg/kg) | "Handbook of Toxicology," 4 vols., Philadelphia, W.B. Saunders Co., 1956-59Vol. 1, Pg. 254, 1955. | |
| dog | LDLo | subcutaneous | 300mg/kg (300mg/kg) | "Handbook of Toxicology," 4 vols., Philadelphia, W.B. Saunders Co., 1956-59Vol. 1, Pg. 254, 1955. | |
| frog | LDLo | subcutaneous | 200mg/kg (200mg/kg) | SENSE ORGANS AND SPECIAL SENSES: MIOSIS (PUPILLARY CONSTRICTION): EYE BEHAVIORAL: MUSCLE WEAKNESS BEHAVIORAL: ATAXIA | Revue Medicale de la Suisse Romande. Vol. 15, Pg. 561, 1895. |
| human | LDLo | oral | 28mg/kg (28mg/kg) | BEHAVIORAL: CONVULSIONS OR EFFECT ON SEIZURE THRESHOLD LUNGS, THORAX, OR RESPIRATION: DYSPNEA GASTROINTESTINAL: OTHER CHANGES | "Toxicology of Drugs and Chemicals," Deichmann, W.B., New York, Academic Press, Inc., 1969Vol. -, Pg. 507, 1969. |
| man | LDLo | subcutaneous | 120mg/kg (120mg/kg) | BEHAVIORAL: CONVULSIONS OR EFFECT ON SEIZURE THRESHOLD BEHAVIORAL: EXCITEMENT GASTROINTESTINAL: CHANGES IN STRUCTURE OR FUNCTION OF SALIVARY GLANDS | Znetralbaltt fuer die Medizinischen Wissenschaften. Vol. 19, Pg. 545, 1881. |
| mouse | LD50 | intraperitoneal | 400mg/kg (400mg/kg) | National Technical Information Service. Vol. AD691-490, | |
| mouse | LD50 | oral | 300mg/kg (300mg/kg) | Gigiena i Sanitariya. For English translation, see HYSAAV. Vol. 38(8), Pg. 6, 1973. | |
| mouse | LD50 | subcutaneous | 566mg/kg (566mg/kg) | Zeitschrift fuer die Gesamte Innere Medizin und Ihre Grenzgebiete. Vol. 2, Pg. 333, 1947. | |
| rabbit | LD50 | oral | 1600mg/kg (1600mg/kg) | GASTROINTESTINAL: GASTRITIS LUNGS, THORAX, OR RESPIRATION: CHRONIC PULMONARY EDEMA | American Journal of Veterinary Research. Vol. 23, Pg. 1264, 1962. |
| rabbit | LDLo | subcutaneous | 1gm/kg (1000mg/kg) | "Abdernalden's Handbuch der Biologischen Arbeitsmethoden." Vol. 4, Pg. 1289, 1935. | |
| rat | LDLo | subcutaneous | 650mg/kg (650mg/kg) | Journal of Agricultural and Food Chemistry. Vol. 17, Pg. 497, 1969. |
Safety Profile
Hazard Codes: 
Xn
Risk Statements: 20/21/22-52/53-68-40
R20/21/22:Harmful by inhalation, in contact with skin and if swallowed.
R52/53:Harmful to aquatic organisms, may cause long-term adverse effects in the aquatic environment.
R68:Possible risk of irreversible effects.
R40:Limited evidence of a carcinogenic effect.
Safety Statements: 22-24/25-61-36/37
S22:Do not breathe dust.
S24/25:Avoid contact with skin and eyes.
S61:Avoid release to the environment. Refer to special instructions / safety data sheets.
S36/37:Wear suitable protective clothing and gloves.
RIDADR: UN 2811 6.1/PG 3
WGK Germany: 3
RTECS: UX2800000
F: 8
HazardClass: 6.1
PackingGroup: III
Specification
Pyrogallol , its cas register number is 87-66-1. It also can be called 1,2,3-Benzenetriol ; 1,2,3-Trihydroxybenzene ; C.I. 76515 .It is a odorless white to gray solid. It sinks and mixes with water. Its reactions turns gray on exposure to light or air.