1.Quick detals:
Melting point 172-175 °C(lit.)
Boiling point 285 °C(lit.)
density 1.32
vapor density 3.81 (vs air)
vapor pressure 1 mm Hg ( 132 °C)
refractive index 1.6320
Fp 165 °C
storage temp. Store below +30°C.
solubility H2O: 50 mg/mL, clear
form Needle-Like Crystals or Crystalline Powder
pka 10.35(at 20℃)
color White to off-white
Water Solubility 70 g/L (20 ºC)
Sensitive Air & Light Sensitive
Merck 14,4808
BRN 605970
2. Description:
| Product Name: | Hydroquinone | Batch No. | JL20211025 |
| Cas | 123-31-9 | MF Date | OCT.25,2021 |
| Packing | 25KGS/BAG | Analysis Date | OCT.25,2021 |
| Quantity | 5MT | Expiry Date | OCT.24,2023 |
| Item | Standard | Result | |
|
Appearance |
White crystalline powder |
Conforms |
|
|
Assay % |
99-101 |
99.9 |
|
|
Melting point |
171-175 |
171.9-172.8 |
|
| Residue after ignition % |
≤0.05 |
0.02 |
|
|
Fe % |
≤0.002 |
＜0.002 |
|
|
Pb % |
≤0.002 |
＜0.002 |
|
|
Conclusion |
Conforms |
||
3. Application:
hydroquinone is a pigment-lightening agent used in bleaching creams. Hydroquinone combines with oxygen very rapidly and becomes brown when exposed to air. Although it occurs naturally, the synthetic version is the one commonly used in cosmetics. Application to the skin may cause allergic reaction and increase skin sun sensitivity. Hydroquinone is potentially carcinogenic and is associated with causing ochronosis, a discoloration of the skin. The u.S. FDA has banned hydroquinone from oTC cosmetic formulations, but allows 4 percent in prescription products.
4. Package
25kg/drum
