| Identification | Back Directory | [Name]
Mercurous oxide，black | [CAS]
15829-53-5 | [Synonyms]
acc.Hahnemann
Mercury(Ⅰ)oxide
Oxydimercury(I)
mercury(Ⅰ)oxidde
Mercury(I) oxide
mercuriooxymercury
Mercury oxide (Hg2O)
Mercurous oxide，black
Mercurio(I)oxymercury(I)
MERCURIOUS OXIDE (BLACK) | [EINECS(EC#)]
239-934-0 | [Molecular Formula]
Hg2O | [MOL File]
15829-53-5.mol | [Molecular Weight]
417.179 |
| Chemical Properties | Back Directory | [Appearance]
Black powder.Soluble in acids; insoluble in water. | [Melting point ]
decomposes at 100℃ [HAW93] | [density ]
9.8 | [solubility ]
insoluble in H2O; soluble in HNO 3 | [form ]
prob mixture of HgO+Hg | [color ]
prob mixture of
HgO+Hg | [Water Solubility ]
insoluble H2O; soluble HNO3; reacts with HCl to form calomel, Hg2Cl2 [MER06] | [EPA Substance Registry System]
Mercury oxide (Hg2O) (15829-53-5) |
| Hazard Information | Back Directory | [Chemical Properties]
Black powder.Soluble in acids; insoluble in water. | [General Description]
Black or brownish-black powder. Not a true compound but rather an intimate mixture of metallic mercury and mercuric oxide. Insoluble in water and denser than water (density 9.8 g / cm3). Hence sinks in water. | [Air & Water Reactions]
Insoluble in water. | [Reactivity Profile]
Mixtures of "Mercurous oxide，black" with barium oxide react vigorously with hydrogen sulfide in air. Explosions may result [Mellor 10:140. 1946-47]. Dissolves in nitric acid. Reacts with hydrochloric acid to give insoluble mercurous chloride (calomel). Contact of the metal oxide caused the explosive decomposition of hydrogen peroxide [Bretherick 5th ed., 1995]. Mixtures with phosphorus or sulfur explode by impact and friction respectively, [Mellor, 1940, Vol. 4, 77]. | [Health Hazard]
Highly toxic, may be fatal if inhaled, swallowed or absorbed through skin. Avoid any skin contact. Effects of contact or inhalation may be delayed. Fire may produce irritating, corrosive and/or toxic gases. Runoff from fire control or dilution water may be corrosive and/or toxic and cause pollution. | [Fire Hazard]
Non-combustible, substance itself does not burn but may decompose upon heating to produce corrosive and/or toxic fumes. Containers may explode when heated. Runoff may pollute waterways. | [Hazard]
Highly toxic. |
| Safety Data | Back Directory | [RIDADR ]
1641 | [HazardClass ]
6.1(a) | [PackingGroup ]
II | [Safety Profile]
A poison. Flammable
by chemical reaction; an oxiduer. Explosive
reaction with hydrogen peroxide, chlorine +
ethylene. Reacts violently with molten
potassium, molten sodmm, S, (HzS + BaO
+ air). Forms explosive mixtures with
nonmetals [e.g., phosphorus (impactsensitive), sulfur (friction-sensitive)].
Incompatible with alkali metals, reducing
materials. Dangerous; when heated to
decomposition it emits highly toxic fumes of
Hg. See also MERCURY COMPOUNDS,
INORGANIC. | [Hazardous Substances Data]
15829-53-5(Hazardous Substances Data) |
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