Name | Antimony pentoxide |
Synonyms | antimonic acid Antimonic“acid” Antimony(V) oxide Antimony pentoxide ANTIMONY PENTOXIDE Antimonic anhydride 1,3-dioxodistiboxane 1,3-dioxide |
CAS | 1314-60-9 |
EINECS | 215-237-7 |
InChI | InChI=1/3H2O.O.Sb/h3*1H2;;/q;;;;+3/p-3/rH3O4Sb/c1-5(2,3)4/h(H3,1,2,3,4) |
Molecular Formula | O5Sb2 |
Molar Mass | 323.52 |
Density | 3.78g/mLat 25°C(lit.) |
Melting Point | 380°C (dec.)(lit.) |
Water Solubility | Slightly soluble in water. Slowly dissolves in warm HCl and warm KOH. Insoluble in HNO3 |
Appearance | Powder |
Specific Gravity | 3.8 |
Color | Yellow |
Exposure Limit | ACGIH: TWA 0.5 mg/m3NIOSH: IDLH 50 mg/m3; TWA 0.5 mg/m3 |
Merck | 14,698 |
Stability | Stable. Incompatible with acids, reducing agents. |
Physical and Chemical Properties | Antimony pentoxide is also known as antimony anhydride. Chemical formula Sb2O5. Molecular weight 323.50. White cubic crystals or pale yellow powder. Relative density of 3.80, the melting point of 300 deg C, higher than 380 deg C when the loss of an oxygen atom to generate four antimony oxide, 930 deg C when the loss of a molecule of oxygen to generate antimony trioxide. Slightly soluble in water, nitric acid, iodine hydrogen acid and alcohol, soluble in hot hydrochloric acid, potassium hydroxide and potassium iodide solution. Reaction with alkali, potassium carbonate and ammonium sulfide. production method: the metal antimony is obtained by interaction with concentrated nitric acid or by reaction of antimony oxide (Sb2O3) with nitric acid. use: antimony compound is also a commonly used inorganic flame retardant, especially when combined with halogen-containing flame retardant, it can produce great flame retardant synergistic effect, thus, the amount of halogen-containing flame retardant can be greatly reduced. Therefore, it is also an effective flame retardant. Colloidal antimony pentoxide particles are very fine, used as flame retardant polymer materials, its flame retardant performance is better than non colloidal antimony pentoxide and antimony trioxide. For plastics, coatings, textile materials, easy to use, especially suitable for high-grade special products on the flame retardant. It can also be used in antimony-making compounds and in the pharmaceutical industry. Figure 1 shows the chemical structure of antimony pentoxide. |
Use | It can be used as an efficient flame retardant synergist for chemical fiber fabrics, plastics, paper, rubber and copper clad laminates |
Hazard Symbols | Xi - Irritant |
Risk Codes | 36/37/38 - Irritating to eyes, respiratory system and skin. |
Safety Description | S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S36 - Wear suitable protective clothing. |
UN IDs | 1549 |
WGK Germany | 3 |
RTECS | CC6300000 |
TSCA | Yes |
Hazard Class | 6.1 |
Packing Group | III |
Toxicity | LD50 i.p. in rats: 400.0 mg Sb/100 g (Bradley, Fredrick) |
Raw Materials | Hydrogen peroxide Antimony(III) oxide |