Product Identification

Product Name

Magnesium hexafluorosilicate hexahydrate

Synonyms

Magnesium fluosilicate
Magnesium hexafluorosilicate

CAS

18972-56-0

Formula

F6MgSi

Molecular Weight

166.38

RTECS

VV8575000

RTECS Class

Agricultural Chemical and Pesticide

Beilstein/Gmelin

10094 (G)

Physical and Chemical Properties

Appearance

White, efflorescent, odorless crystals

Solubility in water

648 g/L

Melting Point

>100

Density

1.788 g/cm3

First Aid Measures

Ingestion

Seek medical assistance.

Inhalation

Move victim to fresh air. Apply artificial respiration if victim is not breathing. Do not use mouth-to-mouth method if victim ingested or inhaled the substance; induce artificial respiration with the aid of a pocket mask equipped with a one-way valve or other proper respiratory medical device. Administer oxygen if breathing is difficult.

Skin

Remove and isolate contaminated clothing and shoes. Remove material from skin immediately. Immediately flush with running water for at least 20 minutes. For minor skin contact, avoid spreading material on unaffected skin.

Eyes

Immediately flush with running water for at least 20 minutes.

Handling and Storage

Storage

Store in a cool, dry location in a tightly sealed container. Corrosive area.

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, may be fatal if inhaled, swallowed or absorbed through skin. Effects of contact or inhalation may be delayed.

Skin

Avoid any skin contact. See Inhalation.

Eyes

See Inhalation.

Ingestion

Moderately toxic. Slightly irritative.

UN (DOT)

2853

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 method most appropriate to fight surrounding fire.

Fire Potential

Non-Combustible

Accidental Release Measures

Small spills/leaks

Do not touch damaged containers or spilled material unless wearing appropriate protective clothing. Stop leak if you can do it without risk. Cover with plastic sheet to prevent spreading. Absorb or cover with dry earth, sand or other non-combustible material and transfer to containers. DO NOT GET WATER INSIDE CONTAINERS.

Stability and Reactivity

Stability

No data.

Incompatibilities

Reacts with acids evolving HF and SiF4, irritating and corrosive gases.

Combustion Products

Fire may produce irritating, corrosive and/or toxic gases.

Transport Information

UN Number

2853

Hazard Class

6.1

Packing Group

III