- About
-
-
- About
-
ACGIH is a 501(c)(3) charitable scientific organization that advances occupational and environmental health.
-
-
- Subscriptions
-
-
-
Get valuable benefits that are vital to your health and safety as an occupational, environmental, health, and safety worker.
-
-
- Science
-
-
- Science
-
This section has been established to help educate industry, government, and the public on what TLVs and BEIs are, and how TLVs and BEIs may best be used.
-
-
- Career Development
-
-
- Career Development
-
ACGIH is committed to providing its members and other occupational and environmental health professionals with the training and education they need to excel in their profession.
-
-
- Publications
-
-
- Publications
-
ACGIH has publications in many different areas that fit your needs in your field.
-
- Publications Store
- ACGIH Signature Publications
ACGIH Digital Library
If you need to purchase the Digital Library, click here.
If you have purchased and need to access the Digital Library, click here.
-
-
THORIUM DIOXIDE: Notice of Intended Change
THORIUM DIOXIDE: Notice of Intended Change
CAS Number: 1314-20-1
Synonyms: Thorium (IV) oxide, Thorium oxide, Dioxothorium, Thoria, Thorotrast, Thortrast, Umbrathor, Thorianite
Molecular Formula: ThO2
Chemical Structure1:
TLV®-TWA: 0.01 mg/m3, Inhalable particulate matter
A4 – Confirmed human carcinogen
To view TLV and Documentation, you must be logged in as an ACGIH member or have previously purchased the documentation.