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15175 Sigma-Aldrich

Bis[tetrakis(hydroxymethyl)phosphonium] sulfate solution

technical, 70-75% in H2O (T)

Synonym: Tetrakis(hydroxymethyl)phosphonium sulfate

  • CAS Number 55566-30-8

  • Linear Formula [(HOCH2)4P]2(SO4)

  • Molecular Weight 406.28

  •  Beilstein/REAXYS Number 8521357

  •  MDL number MFCD23102118

  •  PubChem Substance ID 57647331

  •  NACRES NA.22



Related Categories Chemical Synthesis, Phase Transfer Catalysts, Phosphonium Salts, Synthetic Reagents
Quality Level   100
grade   technical
concentration   70-75% in H2O (T)
impurities   formaldehyde
SMILES string   [O-]S([O-])(=O)=O.OC[P+](CO)(CO)CO.OC[P+](CO)(CO)CO
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



250 mL in poly bottle

Safety & Documentation

Safety Information

Signal word 
UN2922 - class 8 - PG 3 - EHS - acidic - Corrosive liquids, toxic, n.o.s., HI: all
WGK Germany 
Flash Point(F) 
Not applicable
Flash Point(C) 
Not applicable


Certificate of Analysis (COA)

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If available for a given product, the recommended re-test date or the expiration date can be found on the Certificate of Analysis.
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What is the Department of Transportation shipping information for this product?
Transportation information can be found in Section 14 of the product's (M)SDS.To access the shipping information for this material, use the link on the product detail page for the product.
Product 15175, Bis[tetrakis(hydroxymethyl)phosphonium] sulfate solution, is listed as a phase transfer catalyst. What does this mean?
A phase transfer catalyst (PTC) is a compound that promotes or accelerates a chemical reaction by allowing the migration of a specific chemical component from one phase into another phase in a heterogeneous system. A PTC is typically used when the starting materials for a reaction cannot be mixed into the same phase, which would prevent them from coming into contact each other to react. It can transport a reagent from a hydrophilic phase into the hydrophobic phase (and vice versa) so that the subsequent reaction can occur.
Does Sigma-Aldrich offer any chiral phase transfer catalysts?
We offer several chiral phase transfer catalysts to produce enantiospecific products.
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