Most brands of toothpaste have sodium monofluorophosphate or sodium fluoride as their active ingredient.  Ultrabright toothpaste has 0.76% sodium monofluorophosphate as its active ingredient. Sodium monofluorophosphate (SMFP) provides fluorine to the product that contains it.  This is ideal for the toothpaste industry that wishes to provide its customers with products that fight cavitites.
    The chemical formula of sodium monofluorophosphate is Na₂PO₃F, with one oxygen double bonded to the phosphorous atom, and the others bonded with a single bond.  The molar mass of SMFP is 143.9499g/mol and the melting point is 625°C.  SMFP has a density of 1.5 g/ml³.  SMFP has no odor, and is a white solid with a crystal structure.  SMFP is made of components phosphorofluoridic acid, sodium salt, and sodium fluoride.  Sodium monofluorophosphate is also known as disodium monofluorophosphate and sodium monofluorophosphate.
 

References:
http://chemacx.cambridgesoft.com/ChemACX/default.asp?formgroup=basenp_form_group&dbname=chemacx&dataaction=query_string&field_criteria=LIKE&field_type=TEXT&full_field_name=SYNONYM.Name&field_value=sodium%20monofluorophosphate

http://www.walgreens.com/store/product.jhtml?PRODID=1636&CATID=100212

http://www.astrochemicals.com/7051.htm then click on sodium monofluorophosphate link

http://www.chem.ox.ac.uk/course/ityeartwo/html/aquafreshtoothpaste.htm

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