Tin oxide (SnO2)

150.71

150.71

242-159-0

0954

DTXSID8042474

White, tetrahedral crystals|White or slightly gray powder.

2825903100

34.1

-0.23760

White to slightly gray nanopowder

6.95 g/cm³

1630 °C

1800-900°C

1800-1900°C

1.9968

H2O: INsoluble ;soluble in hot concentrated alkalis, and concentrated acids. Insoluble in alcohol.

Store at +5°C to +30°C.

0 mmHg (approx)

SUBLIMES @ 1800-1900 °C

No rapid reaction with air No rapid reaction with water

Non-Redox-Active Inorganic Compounds

TIN(IV) OXIDE is non-flammable and non-combustible. Reacts vigorously with strong reducing agents. Incompatible with chlorine trifluoride.

III

3

UN1993

-

24/25

XQ4000000

Separated from strong reducing agents.

Stable.

P261, P271, P273, P304+P340, P312, P403+P233, P405, P501

H335

SRP: At the time of review, criteria for land treatment or burial (sanitary landfill) disposal practices are subject to significant revision. Prior to implementing land disposal of waste residue (including waste sludge), consult with environmental regulatory agencies for guidance on acceptable disposal practices.

Chlorine trifluoride produces violent reaction without flame in presence of ... stannic oxide.|Stannic oxide, heated with magnesium, explodes.|Lead oxide, stannic oxide, & magnetite (Fe3O4) brought about a violent decomposition of hydrogen trisulfide.|Stannic oxide is reduced by potassium or sodium at gentle heat & the reaction is accompanied by incandescence.|For more Hazardous Reactivities and Incompatibilities (Complete) data for TIN OXIDE (6 total), please visit the HSDB record page.

Not combustible.

|Warning|H335 (70.87%): May cause respiratory irritation [Warning Specific target organ toxicity, single exposure; Respiratory tract irritation]|P261, P271, P273, P304+P340, P312, P403+P233, P405, and P501|Aggregated GHS information provided by 695 companies from 9 notifications to the ECHA C&L Inventory. Each notification may be associated with multiple companies.|Danger|H372: Causes damage to organs through prolonged or repeated exposure [Danger Specific target organ toxicity, repeated exposure]|P260, P264, P270, P314, and P501

In case of fire in the surroundings, use appropriate extinguishing media.

Skin: No recommendation is made specifying the need for personal protective equipment for the body. Eyes: No recommendation is made specifying the need for eye protection. Wash skin: No recommendation is made specifying the need for washing the substance from the skin (either immediately or at the end of the work shift). Remove: No recommendation is made specifying the need for removing clothing that becomes wet or contaminated. Change: No recommendation is made specifying the need for the worker to change clothing after the work shift. (NIOSH, 2016)|(See protection codes)

SRP: The scientific literature for the use of contact lenses in industry is conflicting. The benefit or detrimental effects of wearing contact lenses depend not only upon the substance, but also on factors including the form of the substance, characteristics and duration of the exposure, the uses of other eye protection equipment, and the hygiene of the lenses. However, there may be individual substances whose irritating or corrosive properties are such that the wearing of contact lenses would be harmful to the eye. In those specific cases, contact lenses should not be worn. In any event, the usual eye protection equipment should be worn even when contact lenses are in place.

Recommended Exposure Limit: 10 Hr Time-Weighted avg: 2 mg/cu m.

Personal protection: particulate filter respirator adapted to the airborne concentration of the substance. Sweep spilled substance into covered containers. If appropriate, moisten first to prevent dusting.

Separated from strong reducing agents.

A harmful concentration of airborne particles can be reached quickly when dispersed, especially if powdered.

May cause mechanical irritation to the respiratory tract.

Repeated or prolonged inhalation of dust particles may cause effects on the lungs. This may result in a benign pneumoconiosis (stannosis).

PREVENT DISPERSION OF DUST!

Use local exhaust or breathing protection.

Protective gloves.

Wear safety goggles.

SnO2 occurs naturally as the mineral, cassiterite ... is present in veins closely connected with granite or acid eruptive rocks, but 5/6 of world's total production is derived from secondary alluvial deposits resulting from disintegration of primary deposits.

WHILE MOST OF OPERATIONS ASSOC WITH EXTRACTION & TREATMENT OF TIN ORE ARE WET PROCESSES, TIN DUST OR OXIDE FUME MAY ESCAPE DURING BAGGING OF CONCENTRATE, IN ORE ROOMS & DURING SMELTING OPERATIONS (MIXING PLANT & FURNACE TAPPING), AS WELL AS DURING PERIODIC CLEANING OF BAG FILTERS ... FROM SMELTER FURNACE FLUE BEFORE RELEASE TO THE ATMOSPHERE.

Exposure Routes: inhalation, skin and/or eye contact Symptoms: Stannosis (benign pneumoconiosis): dyspnea (breathing difficulty), decreased pulmonary function Target Organs: respiratory system (NIOSH, 2016)

Eye: If this chemical contacts the eyes, immediately wash the eyes with large amounts of water, occasionally lifting the lower and upper lids. Get medical attention immediately. Contact lenses should not be worn when working with this chemical. Breathing: If a person breathes large amounts of this chemical, move the exposed person to fresh air at once. Other measures are usually unnecessary. (NIOSH, 2016)|(See procedures)

Fresh air, rest.

Rinse skin with plenty of water or shower.

First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then refer for medical attention.

EXPOSURE TO DUST & FUME OF TIN (OXIDE) IS RECOGNIZED TO RESULT IN STANNOSIS, A MILD PNEUMOCONIOSIS, OF WHICH MORE THAN 150 CASES HAVE BEEN REPORTED. ... THE FUME IS CONSIDERED A MORE IMPORTANT SOURCE OF STANNOSIS THAN THE DUST; HOWEVER, OTHER AUTHORITIES CONSIDER QUALITY OF DUST & DURATION OF EXPOSURE EQUALLY IMPORTANT.|... THE CASE OF A MAN WHO WAS SYMPTOMLESS FOR 18 YR AFTER HIS FINAL DUST EXPOSURE /IS DESCRIBED/ ... AT NECROPSY THERE WAS BLACK PIGMENTATION OF PLEURA, LUNG PARENCHYMA, & LYMPH NODES, WITH SOME BRONCHOPNEUMONIA & EMPHYSEMA. LARGEST AMT OF PIGMENTATION OCCCURRED @ SITES OF LYMPHOID NODULES @ BIFURCATIONS OF BRONCHI & BRONCHIOLES. THERE WAS NO INFLAMMATION, NECROSIS OR ... FIBROSIS OF NODES. ... X-RAY DIFFRACTION ANALYSIS INDICATED THAT STANNIC OXIDE WAS THE ONLY TIN CMPD PRESENT ... .|Prolonged exposure to tin(IV) oxide dust & fumes can produce the benign form of pneumoconiosis termed stannosis. The condition develops after at least 3-5 yr of exposure & is characterized by small dense shadows in the pulmonary X-ray picture without impairment of pulmonary function. Fibrosis of the lung does not develop, provided that other agents such as silica are not present.|Stannosis develops in workers who are exposed to airborne particles of tin oxide whether they originate from dust, as in bagging operations, or from fumes of tin oxide produced in smelting. ... 200 tin smelter workers /were examined/ and radiographic changes /were found/ in 121. None of these workers had any clinical signs or symptoms referable to the pneumoconiosis.|Pathologic studies of seven workers with stannosis were reported ... . All had worked in the same tin smelter in England. None died of pulmonary disease. Aggregates of macrophages containing dust were seen around respiratory bronchioles, & less commonly around segmental bronchi, in the alveoli, in the interlobular septa, & in the perivascular lymphatics. The mild focal emphysema observed was felt to be clinically insignificant & was considerably less sever than that seen in coal workers' pneumoconiosis. No fibrosis was present.

stannic oxide

inhalation, skin and/or eye contact

Stannosis (benign pneumoconiosis): dyspnea (breathing difficulty), decreased pulmonary function

Cough.

respiratory system

Grades: white, pure; white; gray; chemically pure|... 99.9 & 99.999% purity grades.|Commercial grade is also known as polishing powder, putty powder, or tin ash.

Miscellaneous manufacturing|Tin oxide (SnO2): ACTIVE|METAL IS NORMALLY COVERED WITH INVISIBLE FILM OF TIN OXIDE.|CASSITERITE IS RECOVERED CHIEFLY BY BUCKETLINE DREDGING. GRAVEL IS SORTED INTO COARSE & FINE; RIFFLED SLUICES SEPARATE HEAVY MINERALS FROM WASTE FINES. SOME DREDGING IS DONE UNDER WATER IN OFF-SHORE DEPOSITS ... .|Found in nature as the mineral cassiterite.|Used in the production of opaque glasses; as an opacifier for glazes and, to a lesser extent, enamels for metals (e.g., cast iron) used in bath tubs, etc.; as a base for certain ceramic colors; and as a component of ceramic capacitors dielectrics. Used as electrodes in the electromelting of lead glass. Other important uses are as a putty powder for polishing marble, granite, glass, and plastic lenses and as a catalyst.|Forms the basis for the patented Tin Sol process for replenishing tin in stannate tine plating baths. /hydrated stannic oxide/

The NIOSH recommended method for airborne inorganic tin & its cmpd, except oxides, is atomic absorption spectrometry following filter collection & acid digestion. The noninclusion of the procedure for tin oxides is a formality only to conform to the OSHA statement on the application of the standard. For determination, if the particulate phase is believed to contain tin dioxide, the acid soln is centrifuged & the tin compounds including tin oxide in the supernatant are determined. The precipitate is then treated with alkali rendering stannic oxide (SnO2) to a sol stannate ... .

Cosmetics -> Opacifying; Viscosity controlling