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| CAS No.: | 7789-69-7 |
|---|---|
| Name: | PHOSPHORUS PENTABROMIDE |
| Molecular Structure: | |
|
|
|
| Formula: | Br5P |
| Molecular Weight: | 430.494 |
| Synonyms: | Phosphorusbromide (6CI,7CI); Phosphorus bromide (PBr5) (8CI); Pentabromophosphorane;Pentabromophosphorus; Phosphoric bromide; Phosphorus pentabromide; Phosphorusperbromide; Phosphorus(V) bromide |
| EINECS: | 232-186-6 |
| Density: | 3.610 |
| Melting Point: | 105-107°C (dec.) |
| Boiling Point: | 105-107°C |
| Flash Point: | 105-107°C |
| Solubility: | Decomposes in water |
| Appearance: | YELLOW TO YELLOW-ORANGE OR ORANGE POWDER, CRYSTALS OR CRYSTALLINE POWDER AND/OR CHUNKS |
| Hazard Symbols: |
|
| Risk Codes: | R14;R34 |
| Safety: | A poison. Corrosive to the eyes, skin and mucous membranes. Flammable by chemical reaction. Contact with moisture can cause a violent reaction and evolution of heat. Incompatible with water or steam to produce heat and toxic and corrosive fumes. When heated to decomposition it emits highly toxic fumes of PBr3 + Br2. See also BROMIDES. |
| Transport Information: | UN 2691 |
| PSA: | 13.59000 |
| LogP: | 5.08920 |
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| Conditions | Yield |
|---|---|
| In Petroleum ether at 20℃; | |
| In Petroleum ether at 20℃; for 1h; | |
| In n-heptane Cooling with ice; |
| Conditions | Yield |
|---|---|
| with small, harmless explosions; |
| Conditions | Yield |
|---|---|
| In water byproducts: PBr3; with concd. aq. HBr; distn.; | |
| In water byproducts: PBr3; with concd. aq. HBr; distn.; |
| Conditions | Yield |
|---|---|
| With phosphorus pentoxide | |
| With P2O5 |
- 10035-10-6, 12258-64-9
hydrogen bromide
A
- 13455-03-3
P(O)Cl2Br
B
- 13550-31-7
P(O)ClBr2
C
- 7789-69-7
phosphorus pentabromide
| Conditions | Yield |
|---|---|
| With trichlorophosphate byproducts: POBr3; 400 °C over pumice; | |
| With POCl3 byproducts: POBr3; 400 °C over pumice; |
| Conditions | Yield |
|---|---|
| With bromine at room temp.; |
- 10035-10-6, 12258-64-9
hydrogen bromide
- 10025-87-3, 12599-09-6, 63736-95-8
trichlorophosphate
A
- 13455-03-3
P(O)Cl2Br
B
- 13550-31-7
P(O)ClBr2
C
- 7789-69-7
phosphorus pentabromide
D
- 7789-59-5
phosphorus(V) oxybromide
| Conditions | Yield |
|---|---|
| In neat (no solvent) passsing gaseous HBr charged with gaseous POCl3 through tube, filled with pumice and heated to 400 to 500°C;; |
| Conditions | Yield |
|---|---|
| with explosion; |
- 3931-89-3
thiophosphoryl(V) bromide
- 10026-13-8, 874483-75-7
phosphorus pentachloride
A
- 3982-91-0
trichlorothiophosphine
B
- 7789-69-7
phosphorus pentabromide
| Conditions | Yield |
|---|---|
| In not given react. with PCl5;; | |
| In not given react. of PCl5 with PSBr3;; |
| Conditions | Yield |
|---|---|
| In neat (no solvent) decomposition with either air or CS2 or on warming;; | |
| In neat (no solvent) decomposition with either air or CS2 or on warming;; |
- Total:16 Page 1 of 1 1
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Chemistry
IUPAC Name: Pentabromo-λ5-phosphane
Synonyms: Pentabromo phosphorus ; Phosphoric bromide ; Phosphoric (v) bromide ; Phosphorus (v) bromide ; Phosphorus bromide ; Phosphorous (v) bromide ; Phosphorus pentabromide ; Phosphorus perbromide
Product Categories: Bromination;C-X Bond Formation (Halogen);Synthetic Reagents
Molecular Formula: PBr5
Molecular Weight: 430.49
Molecular Structure: 
CAS NO: 7789-69-7
EINECS 232-186-6
Mol File: 7789-69-7.mol
Merck : 14,7350
BRN : 3903332
Melting point: 105-107°C (dec.)
Boiling ponit: 105-107°C
Flashing point: 105-107°C
Sensitive Moisture :Sensitive
Appearance:A yellow crystalline solid
Uses
Phosphorus pentabromide (CAS NO: 7789-69-7) is used as brominating agent in organic synthesis.
Production
Brominating agent and Bromine in slight excess in carbon disulfide for the reaction to obtain crystalline substances, isolated from the solvent. With Nitrobenzene as the solvent for re-crystallization, filtration, obtained Phosphorus pentabromide (CAS NO: 7789-69-7) . Its
PBr3 + Br2 → PBr5
Consensus Reports
Reported in EPA TSCA Inventory.
Safety Profile
A poison. Corrosive to the eyes, skin and mucous membranes. Flammable by chemical reaction. Contact with moisture can cause a violent reaction and evolution of heat. Incompatible with water or steam to produce heat and toxic and corrosive fumes. When heated to decomposition it emits highly toxic fumes of PBr3 + Br2. See also BROMIDES.
Hazard Codes 
C
Risk Statements 14-34
R14 :Reacts violently with water.
R34:Causes burns.
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 2691 8/PG 2
WGK Germany 3
HazardClass 8
PackingGroup II
Specification
1.General Description: A yellow crystalline solid that is shipped in sealed containers. Strongly irritating to skin and eyes. Used to make other chemicals.
2.Reactivity Profile: Phosphorus pentabromide (CAS NO: 7789-69-7) is a yellow crystalline compound, toxic and corrosive. Contact with water or steam leads to violent decomposition (hydrolysis) producing toxic and corrosive phosphoryl bromide fumes. When heated to decomposition Phosphorus pentabromide (CAS NO: 7789-69-7) emits toxic fumes of bromide and oxides of phosphorus .
3.Health Hazard : corrosive and/or toxic ; inhalation, ingestion or contact (skin, eyes) with vapors, dusts or substance may cause severe injury, burns or death. Fire will produce irritating, corrosive and/or toxic gases. Reaction with water may generate much heat that will increase the concentration of fumes in the air. Contact with molten substance may cause severe burns to skin and eyes. Runoff from fire control or dilution water may cause pollution.
4.Fire Hazard : except for acetic anhydride (un1715), that is flammable , some of these materials may burn, but none ignite readily. May ignite combustibles (wood, paper, oil, clothing, etc.). Substance will react with water (some violently), releasing corrosive and/or toxic gases and runoff. Flammable/toxic gases may accumulate in confined areas (basement, tanks, hopper/tank cars, etc.). Contact with metals may evolve flammable hydrogen gas. Containers may explode when heated or if contaminated with water. Substance may be transported in a molten form.