Pyrogallol 87-66-1

Pyrogallol

1,2,3-Benzenetriol;Pyrogallol;C.I. 76515;C.I. Oxidation Base 32;Fouramine Brown AP;Fourrine 85;Fourrine PG;Pyrogallic acid;1,2,3-Trihydroxybenzene;2,3-Dihydroxyphenol;NSC 5035;Benzene-1,2,3-triol;Pyrogallol acid;2,6-Dihydroxyphenol;Antioxidant PY;Gallol;1,2,3-Hydroxybenzene;1,2,3-Pyrogallol

87-66-1

C6H6O3

InChIKey=WQGWDDDVZFFDIG-UHFFFAOYSA-N

126.11000

126.11

201-762-9

01Y4A2QXY0

0770

5035

2811

DTXSID6025983

White, lustrous crystals or plates|White crystals, becomes grayish on exposure to light and air|Leaflets or needles

2907299090

Inorganic Salts

60.69000

0.5

Pyrogallic acid is an odorless white to gray solid. Sinks and mixes with water. (USCG, 1999)

1.453 g/cm³ @ Temp: 4 °C

133 °C

309 °C

164.4ºC

n20/D 1.387

H2O: 400 g/L (25 ºC)

IN GENERAL, MATERIALS WHICH ARE TOXIC AS STORED OR WHICH CAN DECOMP INTO TOXIC COMPONENTS SHOULD BE STORED IN A COOL, WELL-VENTILATED PLACE, BUT OUT OF DIRECT RAYS OF THE SUN, AWAY FROM AREAS OF HIGH FIRE HAZARD, & SHOULD BE PERIODICALLY INSPECTED INCOMPATIBLE MATERIALS SHOULD BE ISOLATED

10 mm Hg ( 167.7 °C)

4.4 (vs air)

LD50 orally in rabbits: 1.6 g/kg (Dollahite)

Finely dispersed particles form explosive mixtures in air.

Odorless

Henry's law constant = 1.57X10-10 atm-cu m/mol at 25 °C (est)

pKa = 9.01

Conversion factors: 1 mg/L is equivalent to 194 ppm; 1 ppm is equivalent to 0.00515 mg/L at 25 °C and 760 mm Hg|Sublimes slowly when heated; the aqueous solution darkens on exposure to air, quite rapidly when alkaline

Turns gray on exposure to light or air. Water soluble.

Acids, Weak

Strong Reducing Agent

PYROGALLIC ACID is a strong reducing agent. Reacts with alkalis, NH3, antipyrine, camphor, phenol, iron and lead salts, iodine, lime water, menthol and KMnO4. (NTP, 1992)

2.673 MJ/mol (638.9 kcal/mol)