Riesgo quimico

Prevención de Accidentes con H2S – Ácido Sulfihídrico
• Dónde se encuentra el ácido sulfihídrico
• Propiedades
• Reacción 
• Efectos del ácido sulfihídrico
• Problemasespeciales de salud
• Límites de exposición
• Clasificación de áreas de riesgo
• Medidas preventivas
• Uso del equipo de autocontenido
• Procedimiento de reporte
• Anuncios deadvertencia
• Efectos del ácido sulfihídrico sobre los metales
• Primeros auxilios
• Planes de contingencia

General

Synonyms: hydrogen sulphide, hepatic acid, sewer gas,sulfur hydride, dihydrogen monosulfide, dihydrogen monosulphide, sulphur hydride, stink damp, sulfureted hydrogen
Molecular formula: H2S
CAS No: 7783-06-4
EC No: 231-977-3Physical data

Appearance: colourless gas with strong odour of rotten eggs (odour threshold ca 0.2 ppt)
Melting point: -85 C
Boiling point: -60 C
Vapour density: 1.19Vapour pressure: [Typical cylinder pressure ca. 17 bar)
Critical pressure: 88 atm
Specific gravity: 0.993 g/ml (liquid at BP), 1.539 g/l at 0C, 760 mm Hg (gas)
Flash point: -82 CExplosion limits: 4.3 % - 46 %
Autoignition temperature: 260 C

Stability

Stable. Highly flammable. May form explosive mixture with air. Note wide explosive limits. Incompatiblewith strong oxidizing agents, many metals. May react violently with metal oxides, copper, fluorine, sodium, ethanal.

Toxicology

Highly toxic - may be fatal if inhaled. Inhalation of asingle breath at a concentration of 1000 ppm ( 0.1% ) may cause coma. Corrosive when moist. Skin contact may cause burns. There is a rapid loss of sense of smell on exposure to gas concentrations above150 ppm, and this means that the extent of exposure may be underestimated. Perception threshold ranges from 0.5 ppt to 0.1 ppm. Irritant. Asphyxiant.
Eye contact: Immediately flush the eye with...