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Compound Groups

Compound groups are groups of chemicals that share structural or chemical features. In most cases, hazard lists will assign hazards to individual substances. Compound groups are useful because in some cases, lists will instead identify a group of structurally similar compounds (such as lead compounds) as all having the same hazard. The Pharos staff is in the process of establishing and populating compound groups, and associating warnings from the hazard lists with them. The table below indicates how each compound group is populated, and what is the status of its population.
Compound Groups
COMPOUND GROUP NAME POPULATION STATUS DATE POPULATED DESCRIPTION PROFILE TYPE # MEMBERS # HAZARDS
Clarified oils (petroleum), Heavy Fuel oils incomplete This compound group has not yet been assigned a structural definition. other 2 0
Coal distillates incomplete This compound group has not yet been assigned a structural definition. other 6 0
Coal liquids, liquid solvent extraction and solution incomplete This compound group has not yet been assigned a structural definition. other 3 0
Coal tar distillates incomplete This compound group has not yet been assigned a structural definition. other 25 1
Coal tar pitch volatiles (coal tar products) incomplete

This group has not been assigned a structural definition yet.

0 3
Coal tars, coal tar pitches, coal tar oils incomplete

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

other 12 5
COBALT COMPOUNDS complete

This compound group is defined by the SMILES/SMARTS string "[Co]" and populated from a substructure search of PubChem.. For more information on SMILES, see https://en.wikipedia.org/wiki/Simplified_molecular-input_line-entry_system.

element 1657 24
cobalt compounds that release cobalt ions in vivo complete 10/31/17

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

fixed list 15 0
Cobalt nickel compounds incomplete This compound group has not yet been assigned a structural definition. structure 4 0
Cobalt sulfate heptahydrate (and other soluble cobalt(II) salts) incomplete This compound group has not yet been assigned a structural definition. other 2 1
Cobalt-Tungsten Carbide Powders and Hard Metals incomplete

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

0 2
Colchicine, its salts and derivatives incomplete This compound group has not yet been assigned a structural definition. structure 1 1
Colchicoside and its derivatives incomplete This compound group has not yet been assigned a structural definition. structure 1 1
Color Index (C.I.) Dyes complete 07/19/23

This compound group includes a list of dyes associated with the Color Index list and associated identifiers. It is mainly populated from Comptox's "LIST: Color Index (C.I.) Dyes" and a few others manually added.

functional use 2172 0
Colouring agent CI 12075 incomplete This compound group has not yet been assigned a structural definition. structure 1 1
Compounds Potentially Degrading to PFOS incomplete

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

fixed list 106 17
Conjugated estrogens incomplete

This group has not been assigned a structural definition yet.

0 5
Copper compounds incomplete

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

element 7 6
Creosote and Creosote related substances - ECHA complete 11/05/24

Tar Oils derived from coal and/or wood by distillation or by other processes.

ECHA group: https://echa.europa.eu/substance-information/-/substanceinfo/100.240.872

fixed list 10 8
CREOSOTE COMPOUNDS incomplete This compound group has not yet been assigned a structural definition. other 20 7
Creosote oil and creosote oil acenaphthene fractions and distillates incomplete This compound group has not yet been assigned a structural definition. other 5 7
Cresol isomers complete This compound group has not yet been assigned a structural definition. other 4 1
Crimidine, salts incomplete

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

other 0 1
Crude and refined coal tars complete 04/01/21

This compound group was populated from existing compound groups for the Cradle to Cradle (C2C) RSL.

48 1
CRYSTALLINE SILICAS - RESPIRABLE incomplete

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/#

other 9 8
CYANIDE COMPOUNDS complete

This compound group includes both commercially relevant compounds such as Hydrogen Cyanide, Sodium Cyanide, Potassium Cyanide, and Calcium Cyanide, as well as cyanide salts that are less common. 

structure 39 8
Cyclic, branched or linear completely fluorinated alkanes incomplete

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

0 15
Cyclic, branched or linear completely fluorinated tertiary amines with no unsaturations incomplete

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

0 15
Cyclic, branched, or linear completely fluorinated ethers with no unsaturations incomplete

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

0 15
Cyclizine and its salts incomplete This compound group has not yet been assigned a structural definition. structure 1 1
Cyclocyloxanes - Biomonitoring CA complete

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

fixed list 4 0
Cyclohexane-1,2-dicarboxylic anhydrides incomplete

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.

ECHA chemical group parent: all possible combinations of the cis- and trans-isomers

other 3 5
Cyclomenol and its salts incomplete This compound group has not yet been assigned a structural definition. structure 1 1
Cyclophosphamide and its salts incomplete This compound group has not yet been assigned a structural definition. structure 1 1
Decamethonium bromide incomplete This compound group has not yet been assigned a structural definition. structure 1 1
Dextromethorphan and its salts incomplete This compound group has not yet been assigned a structural definition. structure 1 1
Di- and triether of alkanediols and -triols (C3-C8, linear and branched) with epichlorohydrin (content of free epichlorohydrin < 20 ppm, not characterized as H351 or H350) complete 06/17/19 fixed list 16 0
Di-isodecyl phthalate and metabolite complete This compound group has not yet been assigned a structural definition. other 7 0
Di-n-Octyl Phthalate and metabolites complete This compound group has not yet been assigned a structural definition. other 2 0
Diazonium salts incomplete

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.

other 603 2
Dibenzanthracenes incomplete

This group has not been assigned a structural definition yet.

0 4
DIBENZOFURAN COMPOUNDS in progress This compound group is defined by the SMILES string 'C1=CC=C2C(=C1)C3=CC=CC=C3O2'. For more information on SMILES, see https://en.wikipedia.org/wiki/Simplified_molecular-input_line-entry_system. other 19 0
Dibutyl phthalate and metabolites complete This compound group has not yet been assigned a structural definition. other 2 0
Dibutyltin compounds in progress

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

structure 83 24
Dichlorobenzenes complete This compound group has not yet been assigned a structural definition. other 5 6
Dichloroethylenes complete This compound group has not yet been assigned a structural definition. other 6 0
dichloropropanes complete This compound group has not yet been assigned a structural definition. other 17 6
Dichloropropenes - ATSDR complete 10/21/24

see Agency for Toxic Substances and Disease Registry's Complete Toxicological Profile of Dichloropropenes

fixed list 7 7
Dicofol complete

Dicofol is an organochlorine pesticide comprising two isomers: p,p′-dicofol and o,p′-dicofol. The technical product (95% pure) is a brown viscous oil and is composed of 80-85% p,p′-dicofol and 15-20% o,p’-dicofol with up to 18 reported impurities.

fixed list 0 1
Dicresyl phosphates - Biomonitoring CA incomplete

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

fixed list 0 2
Dicyclohexyl phthalate and metabolite complete This compound group has not yet been assigned a structural definition. other 3 0
Diethyl hexyl phthalate and metabolites complete This compound group has not yet been assigned a structural definition. other 12 0
Diethyl phthalate and metabolite incomplete This compound group has not yet been assigned a structural definition. other 2 0
Diglycidyl ethers of p,p´-bisphenols - Biomonitoring CA incomplete

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

fixed list 0 3
Diisobutyl phthalate and metabolite incomplete This compound group has not yet been assigned a structural definition. other 1 0
Diisocyanates incomplete 03/26/21

This compound group is from the C2C V4 RSL.

25 7
Diisocyanates (TRI Category) 03/09/21

This compound group was populated using a list of chemicals that are reportable under the MA Toxics Use Reduction Act (TURA). See https://www.mass.gov/guides/massdep-toxics-use-reduction-program#-listed-chemicals- for more information.

fixed list 24 8
Diisononyl phthalate (DINP) compounds incomplete

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

other 9 19
Dimethyl phthalate and metabolite incomplete This compound group has not yet been assigned a structural definition. other 4 0
Dimethylarsenic acids complete

This compound group is defined by the SMILES string '[CH3][As](=O)([CH3])O'. For more information on SMILES, see https://en.wikipedia.org/wiki/Simplified_molecular-input_line-entry_system.

structure 18 43
Dimethylphenols incomplete This compound group has not yet been assigned a structural definition. other 0 0
Dimethyltin derivatives complete 07/26/18

This compound group is defined by the SMILES string '[CH3][Sn]([CH3])', then subtracting compounds with 3+ methyl ligands. For more information on SMILES, see https://en.wikipedia.org/wiki/Simplified_molecular-input_line-entry_system.

structure 276 20
Dimevamide and its salts incomplete This compound group has not yet been assigned a structural definition. structure 1 1
Dinitro-ortho-cresol (DNOC) salts incomplete This compound group is defined by the SMILES string 'CC1=C(C=C(C=C1O)[N+](=O)[O-])[N+](=O)[O-]'. For more information on SMILES, see https://en.wikipedia.org/wiki/Simplified_molecular-input_line-entry_system. 3 1
Dinitro-ortho-cresol (DNOC), salts in progress

This compound group is defined by the SMILES string '[CH3]C1=[CH]C(=[CH]C(=C1[OH])[N+](=O)[O-])[N+](=O)[O-]'. For more information on SMILES, see https://en.wikipedia.org/wiki/Simplified_molecular-input_line-entry_system.

other 0 10
Dinitrobenzene isomers incomplete This compound group has not yet been assigned a structural definition. other 8 1
Dinitronaphthalene isomers incomplete This compound group has not yet been assigned a structural definition. other 0 1
Dinitrophenols incomplete This compound group has not yet been assigned a structural definition. other 9 1
Dinitrotoluenes incomplete This compound group has not yet been assigned a structural definition. other 15 1
Dinoseb salts and esters incomplete

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.

structure 10 1
Dinoterb salts and esters complete

This compound group is defined by a substructure search of PubChem the SMILES/SMARTS string "[CH3]C([CH3])([CH3])C1=[CH1]C(=[CH1]C(=C1[OD1])[N+](=O)[O-])[N+](=O)[O-] plus [CH3]C([CH3])([CH3])C1=[CH1]C(=[CH1]C(=C1OC(=O)C)[N+](=O)[O-])[N+](=O)[O-]". The setting "Remove any explicit hydrogens before searching" was deselected from each substructure search. For more information on SMILES, see https://en.wikipedia.org/wiki/Simplified_molecular-input_line-entry_system.

structure 7 10
Dioctyltin compounds in progress

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

structure 12 24
Dioctyltin dilaurate, stannane, dioctyl-, bis(coco acyloxy) derivs., and any other stannane, dioctyl-, bis(fatty acyloxy) derivs. wherein C12 is the predominant carbon number of the fatty acyloxy moiety complete 02/27/23

ECHA chemical group parent

3 6
dioctyltin dilaurate; stannane, dioctyl-, bis(coco acyloxy) derivs. (ECHA defined) complete 02/27/23

ECHA chemical group parent

2 6
Dioxethedrin and its salts incomplete This compound group has not yet been assigned a structural definition. structure 1 1
Dioxin and Dioxin-like Compounds (TRI Category) 03/09/21

This compound group was populated using a list of chemicals that are reportable under the MA Toxics Use Reduction Act (TURA). See https://www.mass.gov/guides/massdep-toxics-use-reduction-program#-listed-chemicals- for more information.

fixed list 17 19
DIOXINS & DIOXIN-LIKE COMPOUNDS incomplete

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

other 22 13
Diphenhydramine and its salts incomplete This compound group has not yet been assigned a structural definition. structure 1 1
Diphenylpyraline and its salts incomplete This compound group has not yet been assigned a structural definition. structure 1 1
Diphenyltin derivatives complete 07/26/18

This compound group is defined by the SMILES string '[CH]1=[CH][CH]=C([CH]=[CH]1)[Sn](C2=[CH][CH]=[CH][CH]=[CH]2)'. For more information on SMILES, see https://en.wikipedia.org/wiki/Simplified_molecular-input_line-entry_system.

structure 153 22
Dithiocarbamates incomplete

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.

other 0 1
Dodecyl phenols incomplete

Populated from Swedish EPA

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

other 8 5
Doxylamine and its salts incomplete This compound group has not yet been assigned a structural definition. structure 1 1
Emetine, its salts and derivatives incomplete This compound group has not yet been assigned a structural definition. structure 1 1
Endocrine Disruptors - Apple RSL complete

This compound group is populated from Apple's Regulated Substances Specification

fixed list 13 1
Endosulfan Isomers complete This compound group was populated from the Stockholm POPs Convention decision http://chm.pops.int/TheConvention/ThePOPs/TheNewPOPs/tabid/2511/Default.aspx fixed list 3 4
Erionite incomplete This compound group has not yet been assigned a structural definition. other 3 0
Eserine and its salts incomplete This compound group has not yet been assigned a structural definition. structure 1 1
esters of 2,4-D incomplete

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

other 0 5
esters of mecoprop and of mecoprop-P incomplete

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

other 0 5
Estrogens, steroidal incomplete

This group has not been assigned a structural definition yet.

0 4
Ethanol, 2,2'-iminobis-, reaction products with epichlorohydrin and 2-nitro-1,4-benzenediamine (HC Blue No. 5) and its salts incomplete This compound group has not yet been assigned a structural definition. structure 2 1
Ethoheptazine and its salts incomplete This compound group has not yet been assigned a structural definition. structure 1 1
Ethylene amines incomplete

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.

other 12 1
ETHYLENEBISDITHIOCARBAMIC ACID, SALTS AND ESTERS 7 1
ethylenediammonium O,O-bis(octyl) phosphorodithioate, mixed isomers incomplete

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

other 0 4
Extract oils (coal), coal-tar residual pyrolysis oils, and other distillate fractions, residues incomplete This compound group has not yet been assigned a structural definition. other 10 0
Extract residues (coal), and other fractions and distillation residues incomplete This compound group has not yet been assigned a structural definition. other 15 0
Extracts (petroleum) and realted distillates and unspecified fractions incomplete This compound group has not yet been assigned a structural definition. other 26 0
Fatty acid dialkylamides and dialkanolamides 2 0