Eastman™ Hydroquinone, Photographic Grade

Application/Uses

- Antioxidant
- Chemical intermediate
- Inhibitor
- Photographic products
- Polymerization inhibitor
- Stabilizer

Product Description

Eastman™ Hydroquinone, Photographic Grade, is a white crystalline solid. HQ is used as a good general-purpose inhibitor, stabilizer, antioxidant, and intermediate. Hydroquinone is offered in both photographic and USP grades for use in many applications.

Typical Properties

Property	Typical Value, Units
Molecular Weight	110.11
Empirical Formula	C6H6O2
Form	White crystals
Assay	99.4 wt % min.
pH	4.1-4.7
Bulk Density *a	0.66 g/mL
Density, Solid Phase@ 4°C	1.34 g/mL
Absorptivity (5% HQ in 0.1NHCl) @ 455 nm (5% HQ in 0.1NHCl) @ 520 nm (5% HQ in 0.1NHCl) @ 700 nm	0.19 max. 0.12 max. 0.07 max.
Water	0.6 wt % max.
Iron	10 ppm
Boiling Point	286°C (547°F)
Sublimation Temperature @ 1 mm Hg @ 1 x 10-2 mm Hg @ 1 x 10-4 mm Hg @ 1 x 106 mm Hg	132°C 85°C 48°C 20°C
Yellowness Index	35 max.
Flash PointCleveland Open Cup	177°C (350°F)
Fire PointCleveland Open Cup	191°C (375°F)
Autoignition Temperature	499°C (930°F)

Comments

Properties reported here are typical of average lots. Eastman makes no representation that the material in any particular shipment will conform exactly to the values given.

Eastman and its marketing affiliates shall not be responsible for the use of this information, or of any product, method, or apparatus mentioned, and you must make your own determination of its suitability and completeness for your own use, for the protection of the environment, and for the health and safety of your employees and purchasers of your products. No warranty is made of the merchantability of fitness of any product, and nothing herein waives any of the Seller's conditions of sale.