product name: |
hydroquinone |
synonyms: |
1,4-benzenediol; quinol; hydroxyquinone; 1,4-dihydroxybenzene; benzene-1,4-diol; naphthalene-1,4-diol; 6,7-dihydroxy-2h-chromen-2-one |
cas rn.: |
123-31-9 |
einecs: |
204-617-8 |
molecular weight: |
178.1415 |
molecular formula: |
c9h6o4 |
density: |
1.563g/cm3 |
melting point(°c): |
170-174°c |
boiling point(°c): |
469.7°c at 760 mmhg |
flash point(°c): |
201.4°c |
refractive_index: |
1.689 |
water solubility: |
70 g/l (20°c) |
1, photo-taking grade(gb10552-89)
index items |
index(%) |
appearance |
white needle crystal |
hydroquinone(hoc6h4oh) content |
99.0~101.0 |
melting point |
171°c~175°c |
solubility |
qualified |
residue on ignition≤ |
0.05 |
heavy metal(based on pb)≤ |
0.002 |
iron(fe) ≤ |
0.002 |
2, technical grade
index items |
index(%) |
appearance |
grey or yellowish powdery crystal |
hydroquinone(hoc6h4oh) content |
≥99 |
melting point |
≥169.5 |
residue on ignition |
≤0.3 |