This compound group is chlorinated alkanes that have the molecular formula CnHxCl(2n+2–x) in which 10 ≤ n ≤ 20 (definition used by Environment Canada).

This compound group has not yet been assigned a structural definition.

This compound group has not yet been assigned a structural definition.

This group is populated by taking the POLYCHLORINATED BIPHENYLS (PCBs) group and removing members with 2 chlorine atoms.

This compound group has not yet been assigned a structural definition.

A structural search would require eliminating compounds containing carbon-hydrogen bonds, which is challenging.

This compound group has not yet been assigned a structural definition.

This compound group is populated by taking the more general compound group and subtracting the chemicals found in the relevent Annex.

This compound group has not yet been assigned a structural definition.

This compound group has not yet been assigned a structural definition.

This compound group is populated by taking the more general compound group and subtracting the chemicals found in the relevent Annex.

This compound group is defined by the SMILES string '[Cr]'. For more information on SMILES, see https://en.wikipedia.org/wiki/Simplified_molecular-input_line-entry_system.

This group has not been assigned a structural definition yet.

This compound group has not yet been assigned a structural definition.

This compound group has not yet been assigned a structural definition.

List extracted from Annex 1 of 

Dossier prepared in support for a nomination of PFOS to the UN-ECE LRTAP Protocol and the Stockholm Convention

The dossier is prepared by the Swedish Chemicals Inspectorate (KemI) and the Swedish EPA, Sweden August 2004

This group has not been assigned a structural definition yet.

This compound group is populated with copper metal, and a limited number of copper salts and alloys.

This compound group has not yet been assigned a structural definition.

The various forms of crystalline silica are: α-quartz, β-quartz, α-tridymite, β-tridymite, α-cristobalite, β-cristobalite, keatite, coesite, stishovite, and moganite. NIOSH (2002)....Keatite, coesite, stishovite, and moganite are rarely found in nature. The most commonly occurring polymorphs are quartz, cristobalite and tridymite, which are found in rocks and soil. 

NIOSH Hazard Review: Health Effects of Occupational Exposure to Respirable Crystalline Silica (DHHS (NIOSH) Publication No. 2002–129). Cincinnati, OH, 145 pp.

From https://www.ncbi.nlm.nih.gov/books/NBK304370/#

This group hasn't been assigned a structural definition yet.

This group hasn't been assigned a structural definition yet.

This group hasn't been assigned a structural definition yet.

This compound group is defined by the SMILES string 'C1CCC2C(C1)C(=O)OC2=O'. For more information on SMILES, see https://en.wikipedia.org/wiki/Simplified_molecular-input_line-entry_system.

This compound group is defined by the SMILES string 'C=[N+]=[N-]'. For more information on SMILES, see https://en.wikipedia.org/wiki/Simplified_molecular-input_line-entry_system.

This group has not been assigned a structural definition yet.

This group is populated from the list at https://biomonitoring.ca.gov/chemicals

This compound group is from the C2C V4 RSL.

This compound group has not yet been assigned a structural definition.

This compound group is defined by the SMILES string 'CCC(C)C1=CC(=CC(=C1O)[N+](=O)[O-])[N+](=O)[O-]'. For more information on SMILES, see https://en.wikipedia.org/wiki/Simplified_molecular-input_line-entry_system.

This compound group is defined by the SMILES string 'CC(C)(C)C1=CC(=CC(=C1O)[N+](=O)[O-])[N+](=O)[O-]'. For more information on SMILES, see https://en.wikipedia.org/wiki/Simplified_molecular-input_line-entry_system.

This compound group has not yet been assigned a structural definition.

This compound group is defined by the SMARTS string 'C(=[SD1])([ND1])[SD1]'. For more information on SMILES, see https://en.wikipedia.org/wiki/Simplified_molecular-input_line-entry_system.

Populated from Swedish EPA

http://webapps.kemi.se/flodesanalyser/

This compound group has not yet been assigned a structural definition.

This compound group has not yet been assigned a structural definition.

This group has not been assigned a structural definition yet.

This compound group is defined by the SMILES string 'C(CN)N'. For more information on SMILES, see https://en.wikipedia.org/wiki/Simplified_molecular-input_line-entry_system.

This compound group has not yet been assigned a structural definition.

This compound group is populated by its subgroups and literature searches for flame retardants. Please contact support@pharosproject.net with any suggestions or additions.

This group includes minerals, amines, and inorganic phosphates

This compound group has not yet been assigned a structural definition.

This compound group has not yet been assigned a structural definition.

This group was populated from the OECD's Comprehensive Global Database of Per- and Polyfluoroalkyl Substances (PFASs) at http://www.oecd.org/chemicalsafety/portal-perfluorinated-chemicals/.

This compound group has not yet been assigned a structural definition.

This compound group is populated by taking the more general compound group and subtracting the chemicals found in the relevent Annex.

This group was populated from the OECD's Comprehensive Global Database of Per- and Polyfluoroalkyl Substances (PFASs) at http://www.oecd.org/chemicalsafety/portal-perfluorinated-chemicals/.