Related Searches: thorium

Thorium(CAS No. 7440-29-1)

Thorium Th (cas 7440-29-1) Molecular Structure

7440-29-1 Structure

Identification and Related Records

【Name】
Thorium
【CAS Registry number】
7440-29-1
【Synonyms】
Thorium, pyrophoric
Thorium-232
THORIUM PLASMA EMISSION SPECTROSCOPY STANDARD
THORIUM PLASMA EMISSION STANDARD
THORIUM
THORIUM ATOMIC ABSORPTION STANDARD
THORIUM SINGLE ELEMENT PLASMA STANDARD
THORIUM SINGLE ELEMENT STANDARD
【EINECS(EC#)】
231-139-7
【Molecular Formula】
Th (Products with the same molecular formula)
【Molecular Weight】
0
【Inchi】
InChI=1/Th
【InChIKey】
ZSLUVFAKFWKJRC-UHFFFAOYSA-N
【MOL File】
7440-29-1.mol

Chemical and Physical Properties

【Density】
1.03 g/mL at 25 °C

Safety and Handling

【Hazard Codes】
T
【Risk Statements】
23/24/25-34
【Safety Statements 】
Suspected carcinogen. Taken internally as ThO2, it has proven to be carcinogenic due to its radioactivity. On an acute basis it has caused dermatitis. Flammable in the form of dust when exposed to heat or flame, or by chemical reaction with oxidizers. The powder may ignite spontaneously in air. Potentially hazardous reactions with chlorine, fluorine, bromine, oxygen, phosphorus, silver, sulfur, air, nitryl fluoride, peroxyformic acid.
【HazardClass】
7
【Safety】

Hazard Codes of Thorium (CAS NO.7440-29-1): ToxicT
Risk Statements: 23/24/25-34 
R23/24/25: Toxic by inhalation, in contact with skin and if swallowed. 
R34: Causes burns.
Safety Statements: 26-27-28-36/37/39-45 
S26: In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. 
S27: Take off immediately all contaminated clothing. 
S28: After contact with skin, wash immediately with plenty of soap-suds. 
S36/37/39: Wear suitable protective clothing, gloves and eye/face protection. 
S45: In case of accident or if you feel unwell, seek medical advice immediately (show the label whenever possible.)
RIDADR: UN 3264 8/PG 3
HazardClass: 7
PackingGroup: Commercial
Suspected carcinogen. Taken internally as ThO2, it has proven to be carcinogenic due to its radioactivity. On an acute basis it has caused dermatitis. Flammable in the form of dust when exposed to heat or flame, or by chemical reaction with oxidizers. The powder may ignite spontaneously in air. Potentially hazardous reactions with chlorine, fluorine, bromine, oxygen, phosphorus, silver, sulfur, air, nitryl fluoride, peroxyformic acid.

【PackingGroup 】
Commercial
【Transport】
UN 3264 8/PG 3
【Specification】

    Thorium (CAS NO.7440-29-1) is slowly attacked by water, but does not dissolve readily in most common acids, except hydrochloric. It dissolves in concentrated nitric acid containing a small amount of catalytic fluoride ion.Thorium is dimorphic, changing at 1400 °C from a face-centered cubic to a body-centered cubic structure. 
    Pure thorium is a silvery-white metal which is air-stable and can retains its luster for several months. Pure thorium is soft, very ductile, and can be cold-rolled, swaged, and drawn,and  often contain several tenths of a percent of the oxide. 
    Powdered thorium metal is often pyrophoric and should be carefully handled. When heated in air, thorium metal turnings ignite and burn brilliantly with a white light. Thorium has the largest liquid range of any element: 2946 °C between the melting point and boiling point.
    If thorium is contaminated with the oxide, it will  slowly tarnishes in air, becoming gray and finally black.

【Report】

Reported in EPA TSCA Inventory.

Biomedical Effects and Toxicity

【Pharmacological Action】
Radiation presents minimal risk to transport workers, emergency response personnel and the public during transportation accidents. Packaging durability increases as potential hazard of radioactive content increases. Undamaged packages are safe. Contents of damaged packages may cause higher external radiation exposure, or both external and internal radiation exposure if contents are released. Low radiation hazard when material is inside container. If material is released from package or bulk container, hazard will vary from low to moderate. Level of hazard will depend on the type and amount of radioactivity, the kind of material it is in, and/or the surfaces it is on. Some material may be released from packages during accidents of moderate severity but risks to people are not great. Released radioactive materials or contaminated objects usually will be visible if packaging fails. Some exclusive use shipments of bulk and packaged materials will not have "RADIOACTIVE" labels. Placards, markings and shipping papers provide identification. Some packages may have a "RADIOACTIVE" label and a second hazard label. The second hazard is usually greater than the radiation hazard; so follow this GUIDE as well as the response GUIDE for the second hazard class label. Some radioactive materials cannot be detected by commonly available instruments. Runoff from control of cargo fire may cause low-level pollution.

Supplier Location

Top Suppliers

QINGDAO XINGYUANTENG CHEMICALS CO.,LTD
Country:ChinaChina
Business Type:Trading Company
Telephone:86-532-88788301
American Elements
Country:United StatesUnited States
Telephone:+1-(310)-208-0551

Quick Search

Cas    Name

Related products

thorium trihydride

thorium trihydride;Thorium(III) hydride;Trihydridethorium(III);Einecs 254-746-9;Thorium hydride (thh3)

bismuth; thorium

THORIUM BISMUTHIDE;bismuth, compound with thorium (2:1)

THORIUM TELLURIDE

THORIUM TELLURIDE

Thorium nitride

trithorium tetranitride

Thorium phosphide

trithorium tetraphosphide

Thorium aluminide

THORIUM ALUMINIDE;aluminium, compound with thorium (3:1)

Thorium bromide

Thoriumtetrabromide;

Thorium oxide

Thoria;Thorium dioxide;Thorium(IV) oxide;Thorotrast;Umbrathor;