trioxorhenium

Name	Rhenium(VI) Oxide
Synonyms	ReO3 trioxorhenium triketorhenium RHENIUMM OXIDE RHENIUM TRIOXIDE Rhenium(VI) Oxide RHENIUM (VI) OXIDE Rhenium oxide (ReO3) Rhenium(VI) trioxide
CAS	1314-28-9
EINECS	215-228-8

Molecular Formula	O3Re
Molar Mass	234.21
Density	6.9-7.4
Melting Point	400°C (dec.)
Boling Point	400°C
Flash Point	400°C
Water Solubility	Insoluble in water.
Appearance	Morphology Powder
Color	Violet
Merck	14,8180
Storage Condition	Room Temprature
Sensitive	Moisture Sensitive
MDL	MFCD00016306
Physical and Chemical Properties	Compared with general oxides, rhenium trioxide has an unusually low resistivity. Similar to metals, their resistivity decreases with decreasing temperature. At 300 K, its resistivity is 100.0 nΩ · m, while at 100 K, it drops to 6.0 nΩ · m. Rhenium trioxide is not active in chemical properties. Insoluble in water, dilute hydrochloric acid and dilute sodium hydroxide, but soluble in concentrated nitric acid and oxidized to perrhenic acid. When it is disproportionated by concentrated alkali, there is no rhenium (VI) salt in the aqueous solution. Heating in vacuum to above 300 ℃, rhenium trioxide disproportionates to Re2O7 and ReO2.
Use	Introduction Rhenium trioxide or rhenium oxide (VI) is an oxide of rhenium with the chemical formula ReO3. It is a red solid with metallic luster and is the only stable trioxide among VIIB group elements.

Hazard Symbols	Xi - Irritant
Risk Codes	36/37 - Irritating to eyes and respiratory system.
Safety Description	S22 - Do not breathe dust. S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S37/39 - Wear suitable gloves and eye/face protection
WGK Germany	3
TSCA	Yes

introduction	rhenium trioxide or rhenium oxide (VI) is an oxide of rhenium with the chemical formula ReO3. It is a red solid with metallic luster and is the only stable trioxide among VIIB group elements.
Properties	Compared with general oxides, rhenium trioxide has an unusually low resistivity. Similar to metals, their resistivity decreases with decreasing temperature. At 300 K, its resistivity is 100.0 nΩ · m, while at 100 K, it drops to 6.0 nΩ · m. Rhenium trioxide is not active in chemical properties. Insoluble in water, dilute hydrochloric acid and dilute sodium hydroxide, but soluble in concentrated nitric acid and oxidized to perrhenic acid. When it is disproportionated by concentrated alkali, there is no rhenium (VI) salt in the aqueous solution. Heating in vacuum to above 300 ℃, rhenium trioxide disproportionates to Re2O7 and ReO2.
preparation	rhenium trioxide cannot be directly prepared from elements. it can be prepared by reducing rhenium heptaoxide by CO at 300 ℃: Re2O7 CO→ 2 ReO3 CO2
EPA chemical information	information provided by: ofmpub.epa.gov (external link)

Last Update：2024-04-10 22:29:15

Rhenium trioxide cannot be directly prepared from elements. It can be prepared by reducing rhenium heptaoxide by CO at 300°C:

Re2O7 CO → 2 ReO3 CO2

Last Update：2024-04-10 22:29:15

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