;

Selenium and compounds, as Se

CAS numbers: 7782-49-2

Silane

Alternative names: silicon tetrahydride, monosilane
CAS numbers: 7803-62-5

Silica fume

CAS numbers: 69012-64-2

Silica fused

CAS numbers: 60676-86-0

Silica-Amorphous

Alternative names: diatomaceous earth (not calcined), glass
CAS numbers: 61790-53-2

Silica-Amorphous, Precipitated silica

CAS numbers: 112926-00-8

Silica-Amorphous, Silica gel

CAS numbers: 63231-67-4

Silica-Crystalline (all forms)

Alternative names: quartz
, alpha quartz
, cristobalite
, tripoli
, tridymite
CAS numbers:

Silicon

CAS numbers: 7440-21-3

Silicon carbide

CAS numbers: 409-21-2

Silver metal

CAS numbers: 7440-22-4

Silver, Soluble compounds, as Ag

CAS numbers: 14701-21-4

Soapstone

CAS numbers:

Sodium azide

CAS numbers: 26628-22-8

Sodium bisulphite

CAS numbers: 7631-90-5

Sodium cyanide, as CN

CAS numbers: 143-33-9

Sodium disulphite

Alternative names: sodium metabisulphite, sodium pyrosulphite
CAS numbers: 7681-57-4

Sodium fluoroacetate (1080)

CAS numbers: 62-74-8

Sodium hydroxide

CAS numbers: 1310-73-2

Starch

Alternative names: amylodextrin, maltose
CAS numbers: 9005-25-8

Stearates

CAS numbers:

Stibine

Alternative names: antimony hydride, antimony trihydride
CAS numbers: 7803-52-3

Strychnine

CAS numbers: 57-24-9

Styrene monomer

Alternative names: phenylethylene
, vinyl benzene
CAS numbers: 100-42-5

Subtilisins (Proteolytic enzymes, as 100% pure crystalline enzyme)

Alternative names: enzyme
CAS numbers: 1395-21-7, 9014-01-1

Sucrose

CAS numbers: 57-50-1

Sulfotep

Alternative names: TEDP
CAS numbers: 3689-24-5

Sulphur dioxide

CAS numbers: 7446-09-5

Sulphur hexafluoride

CAS numbers: 2551-62-4

Sulphur monochloride

CAS numbers: 10025-67-9

Sulphuric acid

CAS numbers: 7664-93-9

Sulphuryl fluoride

CAS numbers: 2699-79-8

Synthetic mineral fibres

Alternative names: mineral wool fibre, man-made mineral fibres, smf, glass, fibrous or dust, fibrous glass dust
CAS numbers: