# Tetrakis(hydroxymethyl)phosphonium sulfate (CAS 55566-30-8) CAS: 55566-30-8 PubChem CID: 41478 InChIKey: YIEDHPBKGZGLIK-UHFFFAOYSA-L Wikidata: Q27262300 Molecular formula: C₈H₂₄O₁₂P₂S Molar mass: 406.28 g/mol IUPAC: bis(tetrakis(hydroxymethyl)phosphanium);sulfate SMILES: C(O)[P+](CO)(CO)CO.C(O)[P+](CO)(CO)CO.[O-]S(=O)(=O)[O-] InChI: InChI=1S/2C4H12O4P.H2O4S/c2*5-1-9(2-6,3-7)4-8;1-5(2,3)4/h2*5-8H,1-4H2;(H2,1,2,3,4)/q2*+1;/p-2 PSA: 250 A^2 Hydrogen bond donors: 8 Hydrogen bond acceptors: 12 Rotatable bonds: 8 Heavy atoms: 23 3D structure: 47 atoms, 44 bonds ## About the compound Tetrakis(hydroxymethyl)phosphonium sulfate (CAS 55566-30-8) is a chemical compound registered under CAS number 55566-30-8. Molecular formula: C₈H₂₄O₁₂P₂S. Molar mass: 406.28 g/mol. The full systematic IUPAC name is: bis(tetrakis(hydroxymethyl)phosphanium);sulfate. The molecule contains 47 atoms connected by 44 chemical bonds. Chemical data comes from the PubChem (NIH), ChEMBL (EBI) and NIST WebBook databases. GHS statement translations comply with the CLP Regulation (EC 1272/2008). Interactive 3D model and 2D skeleton available at: https://molgod.org/molekula/55566-30-8/ ## GHS classification Signal word: Danger Pictograms: GHS05, GHS06, GHS07, GHS08, GHS09 Hazard statements (H): H317: May cause an allergic skin reaction H318: Causes serious eye damage H400: Very toxic to aquatic life H301: Toxic if swallowed Precautionary statements (P): P203: Obtain, read and follow all safety instructions before use P260: Do not breathe dust/fume/gas/mist/vapours/spray ## Synonyms - TETRAKIS(HYDROXYMETHYL)PHOSPHONIUM SULFATE - 55566-30-8 - Retardol S - Pyroset TKO - CCRIS 316 - HSDB 4215 - Octakis(hydroxymethyl)phosphonium sulfate - NCI-C55050 - UNII-5I8RSL9E6S - EINECS 259-709-0 - 5I8RSL9E6S - Bis(tetrakis(hydroxymethyl)phosphonium)sulfate (salt) ## Available in the shop Shop: MolGod Product: Tetrakis(hydroxymethyl)phosphonium sulfate (CAS 55566-30-8) — Ningxia Jinghong URL: https://molgod.org/sds-cards/tetrakishydroxymethylphosphonium-sulfate-cas-55566-30-8/ ## Regulatory compliance checklist Status based on: ADR 2025 (Table A), REACH Annex XVII, CLP Annex VI (harmonised classification), hazard class from the m14-spill DB, SVHC, GIS and the Polish OEL list. Principle: no data = no claim (we do NOT declare "no restrictions" without a basis). 5 required / 12 items [required] SDS (Safety Data Sheet) available (sds) How to comply: Requirement: current SDS compliant with Reg. 1907/2006 (REACH) Annex II, 16-section format. Source / form: https://echa.europa.eu/information-on-chemicals [required] Compliant CLP label (pictograms + signal word + H/P) (clp_label) How to comply: The label must include: GHS pictograms, the signal word (Danger/Warning), hazard (H) and precautionary (P) statements, and manufacturer details. Required since 2010 (substances) and 2015 (mixtures). Source / form: https://eur-lex.europa.eu/legal-content/EN/TXT/?uri=CELEX:32008R1272 [required] Chemical OSH training (substance-specific) (bhp_training) How to comply: Laboratory staff: initial training (general induction + job-specific) + refresher training every 5 years (or every 3 for engineering/technical positions). Documentation kept in personnel files. Source / form: https://isap.sejm.gov.pl/isap.nsf/DocDetails.xsp?id=WDU20040180169 [required] BDO registration (Polish Waste Database) (bdo_registration) How to comply: The GHS classification of this substance indicates properties that may render the waste arising from it hazardous (Regulation 1357/2014, HP properties — with concentration thresholds calculated from the content in the waste, not in the reagent). Whether this gives rise to an obligation to keep BDO records depends on the waste producer and the scale of activity (Art. 50 of the Polish Waste Act; exemptions include up to 100 kg/year of hazardous waste). This is not a statement of obligation for the purchaser. Source / form: https://bdo.mos.gov.pl/ [to be verified] ADR transport (international agreement) (adr_transport) How to comply: No ADR data in the MOL-GOD dataset for this CAS number. Do NOT assume there are no restrictions — before shipping, verify the transport classification in ADR 2025 (Table A) and in section 14 of the safety data sheet (SDS). Source / form: https://unece.org/transport/dangerous-goods/adr-2025-files [conditional] REACH registration (>1 t/year EU import) (reach_registration) How to comply: Importers/manufacturers ≥1 tonne/year must register the substance with ECHA (technical dossier + Chemical Safety Report if ≥10 t). Check the ECHA Annex VI / registered substances list. Source / form: https://echa.europa.eu/regulations/reach/registration [to be verified] SVHC notification (Substances of Very High Concern) (svhc_declaration) How to comply: SVHC status not verified against the available dataset — check the current ECHA candidate list; do not assume the absence of an entry. Source / form: https://echa.europa.eu/candidate-list-table [to be verified] REACH Annex XIV (authorisation list) (reach_annex_xiv) How to comply: Not verified against the ECHA Authorisation List — check REACH Annex XIV. Source / form: https://echa.europa.eu/authorisation-list [to be verified] REACH Annex XVII (use/marketing restrictions) (reach_annex_xvii) Source / form: https://echa.europa.eu/substances-restricted-under-reach [to be verified] OEL — Occupational Exposure Limit in the working environment (nds_workplace) How to comply: No NDS data in the MOL-GOD dataset (incomplete set — ~41 of ~600 substances in the list). Absence does NOT mean there is no NDS — check the full list in Dz.U. 2024 poz. 1017 (Regulation of the Ministry of Family and Social Policy of 4 September 2024), and where none exists apply the OEL from EU directives or values recommended by NIOSH/ACGIH. Source / form: https://isap.sejm.gov.pl/isap.nsf/DocDetails.xsp?id=WDU20240001017 [to be verified] GIS register (precursors / psychotropics) (gis_register) How to comply: Does not appear in the available working set of precursors (list incomplete). Absence is NOT a confirmation — verify against Annex I of Reg. (EC) 273/2004 and the GIS list before placing on the market. Source / form: https://www.gov.pl/web/gis [required] Safety Data Sheet in Polish (sds_pl) How to comply: Requirement: SDS in Polish for trade in PL (Art. 31 REACH + Chemical Substances Act Art. 17). Source / form: https://isap.sejm.gov.pl/isap.nsf/DocDetails.xsp?id=WDU20012112135 ## Data sources - PubChem CID 41478: https://pubchem.ncbi.nlm.nih.gov/compound/41478 - Wikidata: https://www.wikidata.org/wiki/Q27262300 - NIST WebBook: https://webbook.nist.gov/cgi/cbook.cgi?ID=55566-30-8 - ChEMBL: https://www.ebi.ac.uk/chembl/g/#search_results/all/query=55566-30-8 --- Standalone HTML page: https://molgod.org/molekula/55566-30-8/ Markdown version: https://molgod.org/molekula/55566-30-8.md JSON API: https://molgod.org/wp-json/molgod/v1/molecule/55566-30-8 Last updated: 2026-09-02 Generator: MOL-GOD v3.12.33