Name | Quinhydrone |
Synonyms | Quinhydrone Greenhydroquinone GREEN HYDROQUINONE BALSAM CANADA, FILTERED FOR MICROSCOPY 2,5-CYCLOHEXADIENE-1,4-DIONE CMPD WITH 1,4-BENZENEDIOL |
CAS | 106-34-3 |
EINECS | 203-387-6 |
InChI | InChI=1/C6H6O2.C6H4O2/c2*7-5-1-2-6(8)4-3-5/h1-4,7-8H;1-4H |
Molecular Formula | C12H10O4 |
Molar Mass | 218.21 |
Density | 1.32 |
Melting Point | 167-172 °C (lit.) |
Boling Point | 285 °C |
Flash Point | 141.6°C |
Water Solubility | 4 g/L (20 ºC) |
Solubility | Melt in alcohol, ether, ammonia and hot water, slightly soluble in cold water, insoluble in petroleum ether. Partial decomposition during sublimation. The solution is reddish brown. It is yellow when dissolved in ethanol and ether. It is green when dissolved in ammonia. Slightly soluble in chloroform, insoluble in petroleum ether. |
Vapor Presure | 0.00157mmHg at 25°C |
Appearance | Crystallization |
Specific Gravity | 0.863 (20/4℃) |
Color | Dark green |
Merck | 14,8058 |
BRN | 3919222 |
Storage Condition | Store below +30°C. |
Stability | Stable. Incompatible with strong oxidizing agents. |
Sensitive | Light Sensitive |
Refractive Index | 1.4270 (estimate) |
MDL | MFCD00010310 |
Physical and Chemical Properties | Melting Point: 168 - 172 density: 1.4 |
Use | For the Determination of pH, also used as electrode manufacturing materials |
Risk Codes | R22 - Harmful if swallowed R36/37/38 - Irritating to eyes, respiratory system and skin. R50 - Very Toxic to aquatic organisms |
Safety Description | S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S36 - Wear suitable protective clothing. S61 - Avoid release to the environment. Refer to special instructions / safety data sheets. S37/39 - Wear suitable gloves and eye/face protection S29 - Do not empty into drains. |
UN IDs | UN 2811 6.1/PG 3 |
WGK Germany | 3 |
RTECS | VA4550000 |
TSCA | Yes |
HS Code | 2942 00 00 |
Hazard Class | 6.1 |
Packing Group | III |
Toxicity | LD50 orally in rats: 225 mg/kg (Woodward) |
NIST chemical information | Information provided by: webbook.nist.gov (external link) |
EPA chemical information | Information provided by: ofmpub.epa.gov (external link) |
use | for quinohydroquinone electrode (pH determination). Used for the determination of pH value, and also used as electrode manufacturing material appearance: dark green crystalline powder. Melting point 171 ℃. Melt in alcohol, ether, ammonia and hot water, slightly soluble in cold water, insoluble in petroleum ether. After seeing the light, it turns reddish brown with a special smell. Used for the determination of pH value, and also used as electrode manufacturing material Making hydroquinone electrode to determine pH value. Used for hydroquinone electrode; used as urease inhibitor |
production method | 100g barium iron (ammonium ferrate sulfate) is dissolved in 300ml of water at 65 ℃; Dissolve 25g hydroquinone in 100ml of water. Then the iron alum solution was added to the hydroquinone solution in the stirring, that is, the needle crystal was analyzed. Cooling, filtering, washing with cold water, drying to obtain 15g of product. |