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Cas Database |
| Name |
alpha,alpha'-Dibromo-p-xylene |
EINECS | 210-781-1 |
| CAS No. | 623-24-5 | Density | 1.778 g/cm3 |
| PSA | 0.00000 | LogP | 3.47640 |
| Solubility | soluble, hydrolyses | Melting Point |
143-145 °C(lit.) |
| Formula | C8H8Br2 | Boiling Point | 245 °C at 760 mmHg |
| Molecular Weight | 263.96 | Flash Point | 139.5 °C |
| Transport Information | UN 3448 6.1/PG 2 | Appearance | white to light yellow crystal powder |
| Safety | 26-36/37/39-45 | Risk Codes | 34-22 |
| Molecular Structure |
|
Hazard Symbols |
 C
|
| Synonyms |
p-Xylene, a,a'-dibromo- (6CI,7CI,8CI);1,4-Bis(bromomethyl)benzene;1,4-Di(bromomethyl)benzene;1,4-Xylylene dibromide;4-Bromomethylbenzylbromide;NSC 6226;p-Bis(bromomethyl)benzene;p-Di(bromomethyl)benzene;p-Xylylene bromide;p-Xylylene dibromide;a,a'-Dibromo-p-xylene; |
Article Data | 75 |
alpha,alpha'-Dibromo-p-xylene Synthetic route
| Conditions | Yield |
|---|---|
| With Silphos; bromine In acetonitrile for 0.166667h; Heating; | 97% |
| With hydrogen bromide bei der Destillation; |
| Conditions | Yield |
|---|---|
| With N-Bromosuccinimide; dibenzoyl peroxide In tetrachloromethane for 4h; Bromination; Heating; | 90% |
| With hydrogen bromide; sodium bromide In chloroform; water at 0 - 2℃; Electrolysis; | 90% |
| With hydrogen bromide; sodium bromide In chloroform; water at 15℃; Electrolysis; | 90% |
| Conditions | Yield |
|---|---|
| With isopinocampheyl-boron dibromide dimethylsulfide complex In hexane at 20℃; for 5h; Reduction; bromination; | 81% |
| Conditions | Yield |
|---|---|
| With sodium bromate; sodium hydrogensulfite In water; ethyl acetate at 20℃; for 4h; Bromination; | A 70% B 6% |
| With N-Bromosuccinimide In water at 25℃; for 22h; Wohl-Ziegler bromination; | A 3% B 66% |
| With hydrogen bromide; dihydrogen peroxide In water at 20℃; Irradiation; | A 10% B 62% |
| Conditions | Yield |
|---|---|
| With [2,5-Me2C6H3SO2N(Br)CH2]2; dibenzoyl peroxide In tetrachloromethane at 77℃; for 1.5h; Bromination; | 62% |
| Conditions | Yield |
|---|---|
| With phosphoric acid; hydrogen bromide; acetic acid at 95 - 110℃; Einleiten von HBr; |
| Conditions | Yield |
|---|---|
| With tetrachloromethane; hydrogen bromide; zinc dibromide | |
| With hydrogen bromide; acetaldehyde |
- 4497-29-4
bis(bromomethyl) ether
- 5435-44-9, 22243-66-9
(E)-3-Ureido-but-2-enoic acid ethyl ester
- 71-43-2
benzene
A
- 623-24-5
1,4-bis(bromomethyl)benzene
B
- 100-39-0
benzyl bromide
| Conditions | Yield |
|---|---|
| With zinc(II) chloride |
- 4497-29-4
bis(bromomethyl) ether
- 71-43-2
benzene
A
- 623-24-5
1,4-bis(bromomethyl)benzene
B
- 100-39-0
benzyl bromide
| Conditions | Yield |
|---|---|
| With zinc(II) chloride |
alpha,alpha'-Dibromo-p-xylene Chemical Properties
IUPAC Name: 1,4-bis(Bromomethyl)benzene
Synonyms of alpha,alpha'-Dibromo-p-xylene (CAS NO.623-24-5): 1,4-Bis(Bromomethyl)benzene ; p-Xylylene dibromide
CAS NO: 623-24-5
Molecular Formula: C8H8Br2
Molecular Weight: 263.96
Molecular Structure: 
EINECS: 210-781-1
H bond acceptors: 0
H bond donors: 0
Freely Rotating Bonds: 2
Polar Surface Area: Å2
Index of Refraction: 1.611
Molar Refractivity: 51.54 cm3
Molar Volume: 148.4 cm3
Surface Tension: 45.3 dyne/cm
Density: 1.778 g/cm3
Flash Point: 139.5 °C
Enthalpy of Vaporization: 46.25 kJ/mol
Boiling Point: 245 °C at 760 mmHg
Vapour Pressure: 0.046 mmHg at 25°C
Melting Point: 143-145 °C(lit.)
Water Solubility: soluble, hydrolyses
Sensitive: Lachrymatory
Appearance: white to light yellow crystal powder
Product Categories of alpha,alpha'-Dibromo-p-xylene (CAS NO.623-24-5): Aromatic Halides (substituted)
alpha,alpha'-Dibromo-p-xylene Safety Profile
Safety Information about alpha,alpha'-Dibromo-p-xylene (CAS NO.623-24-5):
Hazard Codes: 
C
Risk Statements: 34-22
R34: Causes burns.
R22: Harmful if swallowed.
Safety Statements: 26-36/37/39-45
S26: In case of contact with eyes, rinse immediately with plenty of water and seek medical advice.
S36/37/39: Wear suitable protective clothing, gloves and eye/face protection.
S45: In case of accident or if you feel unwell, seek medical advice immediately (show the label whenever possible.)
RIDADR: UN 3448 6.1/PG 2
WGK Germany: 3
F: 8-19-21
Hazard Note: Corrosive/Lachrymatory
HazardClass: 8
PackingGroup: III
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