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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
Diethyl hexyl phthalate and metabolites complete This compound group has not yet been assigned a structural definition. other 12 0
Dicyclohexyl phthalate and metabolite complete This compound group has not yet been assigned a structural definition. other 3 0
Dicresyl phosphates - Biomonitoring CA incomplete

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

fixed list 0 1
dichloropropanes complete This compound group has not yet been assigned a structural definition. other 17 0
Dichloroethylenes complete This compound group has not yet been assigned a structural definition. other 6 0
Dichlorobenzenes complete This compound group has not yet been assigned a structural definition. other 5 6
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 21
Dibutyl phthalate and metabolites complete This compound group has not yet been assigned a structural definition. other 2 0
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
Dibenzanthracenes incomplete

This group has not been assigned a structural definition yet.

0 4
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
Di-n-Octyl Phthalate and metabolites complete This compound group has not yet been assigned a structural definition. other 2 0
Di-isodecyl phthalate and metabolite complete This compound group has not yet been assigned a structural definition. other 7 0
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
Dextromethorphan 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
Cyclophosphamide and its salts incomplete This compound group has not yet been assigned a structural definition. structure 1 1
Cyclomenol and its salts incomplete This compound group has not yet been assigned a structural definition. structure 1 1
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 4
Cyclocyloxanes - Biomonitoring CA complete

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

fixed list 4 1
Cyclizine and its salts incomplete This compound group has not yet been assigned a structural definition. structure 1 1
Cyclic, branched, or linear completely fluorinated ethers with no unsaturations incomplete

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

0 14
Cyclic, branched or linear completely fluorinated tertiary amines with no unsaturations incomplete

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

0 14
Cyclic, branched or linear completely fluorinated alkanes incomplete

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

0 14
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
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
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
Crimidine, salts incomplete

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

other 0 1
Cresol isomers complete This compound group has not yet been assigned a structural definition. other 4 1
Creosote oil and creosote oil acenaphthene fractions and distillates incomplete This compound group has not yet been assigned a structural definition. other 5 0
CREOSOTE COMPOUNDS incomplete This compound group has not yet been assigned a structural definition. other 13 6
Copper compounds incomplete

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

element 7 5
Conjugated estrogens incomplete

This group has not been assigned a structural definition yet.

0 5
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 15
Colouring agent CI 12075 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
Colchicoside and its derivatives incomplete This compound group has not yet been assigned a structural definition. structure 1 1
Colchicine, its salts and derivatives incomplete This compound group has not yet been assigned a structural definition. structure 1 1
Cobalt-Tungsten Carbide Powders and Hard Metals incomplete

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

0 2
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 nickel compounds incomplete This compound group has not yet been assigned a structural definition. structure 4 0
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 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 23
Coal tars, coal tar pitches, coal tar oils incomplete

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

other 12 5
Coal tar pitch volatiles (coal tar products) incomplete

This group has not been assigned a structural definition yet.

0 3
Coal tar distillates incomplete This compound group has not yet been assigned a structural definition. other 25 1
Coal liquids, liquid solvent extraction and solution incomplete This compound group has not yet been assigned a structural definition. other 3 0
Coal distillates incomplete This compound group has not yet been assigned a structural definition. other 6 0
Clarified oils (petroleum), Heavy Fuel oils incomplete This compound group has not yet been assigned a structural definition. other 2 0
Cinchophen, its salts, derivatives and salts of these derivatives incomplete This compound group has not yet been assigned a structural definition. structure 2 1
Cinchocaine and its salts incomplete This compound group has not yet been assigned a structural definition. structure 1 1
Chromium Compounds incomplete

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.

element 535 4
Chromium (VI) compounds, with the exception of barium chromate and of compounds specified elsewhere in Annex VI to Regulation (EC) No 1272/2008 incomplete

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

118 51
CHROMIUM (VI) COMPOUNDS complete 11/17/17 This compound group is defined by the SMILES string '[Cr+6]'. For more information on SMILES, see https://en.wikipedia.org/wiki/Simplified_molecular-input_line-entry_system. other 152 44
CHROMIUM (III) COMPOUNDS complete 11/17/17 This compound group is defined by the SMILES string '[Cr+3]'. For more information on SMILES, see https://en.wikipedia.org/wiki/Simplified_molecular-input_line-entry_system. element 383 8
Chromic acid, salts incomplete

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

other 6 5
Choline salts and their esters incomplete This compound group has not yet been assigned a structural definition. structure 2 1
Chlorprothixene and its salts incomplete This compound group has not yet been assigned a structural definition. structure 1 1
Chlorotoluenes complete 05/01/17

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

other 15 5
Chloroplatinates incomplete

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

structure 5 1
CHLOROPHENOLS incomplete This compound group has not yet been assigned a structural definition. other 33 3
chloronitroanilines with the exception of those specified elsewhere in Annex VI of Regulation (EC) No 1272/2008 incomplete

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

0 6
chloronitroanilines incomplete

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

structure 1 0
CHLOROFLUOROCARBONS (CFC) incomplete

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.

other 45 4
Chloroethanes incomplete This compound group has not yet been assigned a structural definition. other 2 2
Chlorobiphenyls that have the molecular formula C12H(10-n)Cln in which "n" is greater than 2 incomplete

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

223 37
Chlorobenzenes (1-6 Chlorines) incomplete

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

other 22 6
chloroanilines with the exception of those specified elsewhere in Annex VI of Regulation (EC) No 1272/2008 complete

This compound group is composed of the 5 isomers not explicitly included in Annex VI of Regulation (EC) No 1272/2008 (CLP Regulation). Total number of isomers: monochloroanilines (3 isomers), dichloroanilines (6 isomers), trichloroanilines (6 isomers), tetrachloroanilines (3 isomers) and pentachloroaniline (1 isomer). 

  • 3,4-dichloroaniline
  • 3,5-dichloroaniline
  • 2,3,5-trichloroaniline
  • 2,3,6-trichloroaniline
  • 2,3,4,6-tetrachloroaniline

The following isomers are not included, because they are listed in the Annex as of 7/9/19:

fixed list 5 6
Chloroalkyl ethers incomplete This compound group has not yet been assigned a structural definition. other 4 0
Chlormethine and its salts incomplete This compound group has not yet been assigned a structural definition. structure 1 1
CHLORINATED POLYMERS incomplete This compound group has not yet been assigned a structural definition. other 119 7
Chlorinated Paraffins (SCCP and MCCP) - Apple RSS complete

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

fixed list 5 0
CHLORINATED PARAFFINS incomplete This compound group has not yet been assigned a structural definition. other 121 10
Chlorinated Organic Solvents in Google's MRSL complete 02/12/21

This compound group was populated from the Google Manufacturing Restricted Substances Specification (v1.0) (TTD_3549)

fixed list 20 2
Chlorinated Organic Solvents - Apple RSS complete

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

fixed list 20 1
Chlorinated Organic Compounds incomplete This compound group is defined by the SMILES string 'C[Cl]'. For more information on SMILES, see https://en.wikipedia.org/wiki/Simplified_molecular-input_line-entry_system. structure 3970 6
Chlorinated Flame Retardants (CFRs) incomplete

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

functional use 74 14
Chlorinated biphenyl oxides incomplete This compound group has not yet been assigned a structural definition. other 2 7
Chlorinated Alkanes (C10-20, Environment Canada) aka Chlorinated Paraffins incomplete

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).

other 36 11
Chloric acid, salts incomplete

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

other 0 3
Chlordimeform, salts incomplete

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

other 0 4
Chloramine T and related compounds, Tosylchloramide sodium (INN) incomplete This compound group has not yet been assigned a structural definition. structure 1 1
Certain Phthalates (OSPAR) incomplete

DBP and DEHP were added to the OSPAR List of Chemicals for Priority Action in 1998 as part of the group “certain phthalates”. https://www.ospar.org/documents?v=7028

fixed list 12 13
Cerium Compounds complete 07/31/18

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

element 349 1
Cephaeline and its salts incomplete This compound group has not yet been assigned a structural definition. structure 1 1
cellulases with the exception of those specified elsewhere in Annex VI of Regulation (EC) No 1272/2008 incomplete

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

0 1
CCRIS 33 and 28 incomplete This compound group has not yet been assigned a structural definition. other 1 1
Cartap, salts incomplete

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

other 0 4
Carboxylic acids (higher fatty acids) barium salts incomplete This compound group has not yet been assigned a structural definition. other 1 1
Caramiphen and its salts incomplete This compound group has not yet been assigned a structural definition. structure 1 1
cadmium compounds, with the exception of cadmium sulphoselenide, reaction of cadmium sulphide with zinc sulphide, reaction of cadmium sulphide with mercury sulphide, and those specified elsewhere in Annex VI of Regulation (EC) No 1272/2008 incomplete

This compound group is populated by taking the more general compound group and subtracting the chemicals listed.

369 53
Cadmium Compounds, Soluble incomplete

This compound group is populated from Table 1-1 of NTP Report on Carcinogens 1997 Background Document for Cadmium at https://ntp.niehs.nih.gov/ntp/newhomeroc/other_background/cadmium_508.pdf.

other 10 49
Cadmium compounds, inorganic in progress This compound group is defined by the SMILES string '[Cd]' and subsequently filtered to remove substances containing '[C]'. For more information on SMILES, see https://en.wikipedia.org/wiki/Simplified_molecular-input_line-entry_system. other 195 51
CADMIUM COMPOUNDS in progress This compound group is defined by the SMILES string '[Cd]'. For more information on SMILES, see https://en.wikipedia.org/wiki/Simplified_molecular-input_line-entry_system. element 499 48
C1-C4 Halogenated Hydrocarbons (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 343 4
Butyltin compounds in progress

This compound group is populated by its subgroups.

structure 212 15
Butylbenzyl phthalate and metabolite incomplete This compound group has not yet been assigned a structural definition. other 2 0
Butyl phenols incomplete

Populated from Swedish EPA

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

other 62 4
Butopiprine and its salts incomplete This compound group has not yet been assigned a structural definition. structure 1 1
Butanilicaine and its salts incomplete This compound group has not yet been assigned a structural definition. structure 1 1