Product Identification

Product Name

Calcium hexafluorosilicate

Synonyms

Calcium fluorosilicate
Calcium fluosilicate
Calcium silicofluoride
Silicate(2-), hexafluoro-, calcium (1:1)

CAS

16925-39-6

Formula

CaF6Si

Molecular Weight

182.16

EINECS

240-991-9

RTECS

EW4025000

RTECS Class

Other

Merck

12,1714

Beilstein/Gmelin

19406 (G)

Physical and Chemical Properties

Appearance

Colorless tetragonal crystals

Solubility in water

Soluble

Density

2.622 g/cm3 (20 C)

Usage

Preservative in wood industry, hardener in concrete, opaliger in glass and porcelain enamel. Produce silicon tetrafluoride and calcium fluoride. .

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.

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.

UN (DOT)

2856

Exposure Controls/Personal Protection

Personal Protection

Wear appropriate protective gloves, clothing and goggles.

Respirators

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

Exposure limit(s)

NIOSH: 10H TWA 2.5 mg(F)/m3

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.

Transport Information

UN Number

2856

Hazard Class

6.1

Stability and Reactivity

Combustion Products

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