NIOSH Publication No. 2005-151:

NIOSH Pocket Guide to Chemical Hazards

September 2005

Tin(II) oxide (as Sn)

CAS
21651-19-4

SnO

RTECS
XQ3700000
Synonyms & Trade Names

Stannous oxide, Tin protoxide [Note: Also see specific listing for Tin(IV) oxide (as Sn).]
DOT ID & Guide

Exposure
Limits

NIOSH REL: TWA 2 mg/m3
OSHA PEL: none
IDLH
N.D. See: IDLH INDEX
Conversion
Physical Description
Brownish-black powder.
MW: 134.7
BP: Decomposes
MLT(600 mmHg): 1976°F (Decomposes)
Sol: Insoluble
VP: 0 mmHg (approx)
IP: NA

Sp.Gr: 6.3
Fl.P: NA
UEL: NA
LEL: NA

Incompatibilities & Reactivities

None reported
Measurement Methods
NIOSH 7300, 7301, 7303
See: NMAM or OSHA Methods
Personal Protection & Sanitation
(See protection)
Skin: No recommendation
Eyes: No recommendation
Wash skin: No recommendation
Remove: No recommendation
Change: No recommendation

First Aid
(See procedures)
Eye: Irrigate immediately

Breathing: Fresh air

Respirator Recommendations
Not available.
Important additional information about respirator selection
Exposure Routes
inhalation, skin and/or eye contact
Symptoms
Stannosis (benign pneumoconiosis): dyspnea (breathing difficulty), decreased pulmonary function
Target Organs
respiratory system
See also: INTRODUCTION   See ICSC CARD: 0956   See MEDICAL TESTS: 0229