Product Identification

Product Name

Ferric silicon

Synonyms

Ferric silicon
Iron disilicide

CAS

8049-17-0

Formula

FeSi2

Molecular Weight

112.01

RTECS

LK1400000

RTECS Class

Other

Beilstein/Gmelin

17823 (G)

Physical and Chemical Properties

Appearance

Odorless, crystalline solid.

Solubility in water

Insoluble

Melting Point

153.5

Density

5.4 g/cm3 (20 C)

Usage

Used to add silicon to iron and steel.

First Aid Measures

Ingestion

Seek medical assistance.

Inhalation

Remove to fresh air. If breathing has stopped, give artificial respiration. If breathing is difficult, give oxygen.

Skin

Remove contaminated clothing and shoes. Flush with water.

Eyes

Flush with water for at least 15 min., lifting lids occasionally.

Handling and Storage

Storage

Keep in a cool, dry, dark location in a tightly sealed container or cylinder. Keep away from incompatible materials, ignition sources and untrained individuals. Secure and label area. Protect containers/cylinders from physical damage.

Handling

All chemicals should be considered hazardous. Avoid direct physical contact. Use appropriate, approved safety equipment. Untrained individuals should not handle this chemical or its container. Handling should occur in a chemical fume hood.

Hazards Identification

Inhalation

Highly toxic: contact with water produces toxic gas, may be fatal if inhaled. Inhalation or contact with vapors, substance, or decomposition products may cause severe injury or death.

Skin

See Inhalation.

Eyes

May cause burns.

Hazards

Irritating vapors and toxic gases may be formed when involved in fire.

UN (DOT)

1408

Exposure Controls/Personal Protection

Personal Protection

Wear appropriate protective gloves, clothing and goggles.

Respirators

Wear positive pressure self-contained breathing apparatus (SCBA).

Exposure Effects

The toxological properties of this substance have not been fully investigated.

Fire Fighting Measures

Fire Fighting

Use dry chemical, graphite, or dry earth. Do not use water on material itself. Cool all affected containers with flooding quantities of water. Apply water from as far a distance as possible.

Accidental Release Measures

Small spills/leaks

Keep material out of water sources and sewers. Build dikes to contain flow as necessary. Keep material dry. Do not use water on material itself. Attempt to stop leak if without undue personnel hazard.

Stability and Reactivity

Incompatibilities

May react very rapidly Reacts exothermically with compounds having active hydrogen atoms (such as acids and water) to form flammable hydrogen gas and caustic products May react with azo/diazo compounds to form explosive products Can react explosively with oxidizing materials.

Stability

No data.

Combustion Products

Irritating vapors and toxic gases may be formed when involved in fire.

Transport Information

UN Number

1408

Hazard Class

4.3

Packing Group

III