Diantimony trioxide CAS#1309-64-4

CAS Number: 1309-64-4
Chemical Formula: O3Sb2
Synonyms:

ANTIMONY(+3)OXIDE
ANTIMONY TRIOXIDE
SB OXIDE

Appearance: White Powder

MOQ (Minimum Order Quantity): 1 FCL (Full Container Load)

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Product Details

Diantimony trioxide CAS#1309-64-4

Occurs as colorless orthorhombic modifications, valentinite, or colorless cubic form, senarmontite; density 5.67 g/cm3 (valentinite), 5.20g/cm3 (senarmontite); cubic modification is dimeric consisting of Sb2O6 discrete molecules; refractive index 2.087; melts in the absence of oxygen at 656°C; boils at 1,550°C (sublimes); sublimes in vacuum at 400°C; very slightly soluble in water, insoluble in organic solvents; soluble in HCl, caustic alkalies and tartaric acid.

Diantimony trioxide Chemical Properties

Melting point	655 °C (lit.)
Boiling point	1550 °C (lit.)
bulk density	800-1300kg/m3
density	5.20
vapor pressure	13.3 hPa (660 °C)
Fp	1550°C subl.
storage temp.	Store below +30°C.
solubility	2.70mg/l
form	powder
color	White
Specific Gravity	5.67
Odor	wh. cubic or orthorhombic cryst., odorless
biological source	rabbit
Water Solubility	Slightly soluble. <0.1 g/100 mL at 20 ºC
crystal system	Cube
Merck	14,711
Space group	Fd3m
Lattice constant	a/nmb/nmc/nmα/oβ/oγ/oV/nm31.1141.1141.1149090901.3825
Exposure limits	ACGIH: TWA 0.5 mg/m3 NIOSH: IDLH 50 mg/m3; TWA 0.5 mg/m3
Stability:	Stable.
InChIKey	MUBFITUCTVFSOJ-UHFFFAOYSA-L
CAS DataBase Reference	1309-64-4(CAS DataBase Reference)
IARC	2B (Vol. 47) 1989
NIST Chemistry Reference	Antimony trioxide(1309-64-4)
EPA Substance Registry System	Antimony trioxide (1309-64-4)

Safety Information

Hazard Codes	Xn,Xi,T
Risk Statements	40-61
Safety Statements	22-36/37-45-53
RIDADR	1549
WGK Germany	2
RTECS	CC5650000
Hazard Note	Irritant
TSCA	Yes
HazardClass	6.1
PackingGroup	III
HS Code	28258000
Hazardous Substances Data	1309-64-4(Hazardous Substances Data)
Toxicity	LD50 orally in rats: >20 g/kg (Smyth)

Product Application of Diantimony trioxide CAS#1309-64-4

Antimony Trioxide (commonly referred to as antimony oxide), Sb2O3 is used to impart flame retardancy to plastics. Although antimony trioxide is found in nature, it is too impure to be used. Flameretardant grades of antimony oxides are manufactured from either antimony metal or the sulfide ore by oxidation in air at 600–800 °C. The particle size and chemical reactivity is determined by the processing conditions, enabling the production of several different grades. Antimony trioxide is from 99.0–99.9 wt % Sb2O3. The remainder consists of 0.4–0.01 wt % arsenic; 0.4–0.01, lead; 0.1–0.0001, iron; 0.005–0.0001, nickel; and 0.01–0.0001, sulfates. It is insoluble in water and the loss on drying at 110 °C is 0.1 wt % max.
Antimony trioxide has been used as a white pigment since ancient times. The pigmentation from antimony oxide in plastics can be controlled and adjusted by the judicious selection of a Sb2O3 grade having a specific particle size. The product with the smallest particle size and the narrowest particle-size range imparts the whitest color and highest opacity. Translucent plastics can be made by using low tint grades with relatively large particles.

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