Padimate A

Padimate A
Names
	Preferred IUPAC name 3-Methylbutyl 4-(dimethylamino)benzoate
	Other names isoamyl dimethyl PABA; Escalol 506, 4-dimethylaminobenzoic acid isopentyl ester
Identifiers
CAS Number	21245-01-2 ;
3D model (JSmol)	Interactive image;
ChemSpider	80159 ;
ECHA InfoCard	100.040.247
PubChem CID	88836;
UNII	956679A27P ;
CompTox Dashboard (EPA)	DTXSID3046580 ;
	InChI InChI=1S/C14H21NO2/c1-11(2)9-10-17-14(16)12-5-7-13(8-6-12)15(3)4/h5-8,11H,9-10H2,1-4H3 Key: OFSAUHSCHWRZKM-UHFFFAOYSA-N ; InChI=1/C14H21NO2/c1-11(2)9-10-17-14(16)12-5-7-13(8-6-12)15(3)4/h5-8,11H,9-10H2,1-4H3 Key: OFSAUHSCHWRZKM-UHFFFAOYAM;
	SMILES CC(C)CCOC(=O)c1ccc(cc1)N(C)C;
Properties
Chemical formula	C14H21NO2
Molar mass	235.322
Melting point	<25 °C
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). verify (what is ?) Infobox references

Padimate A is an organic compound that is an ingredient in some sunscreens. It is an ester derivative of PABA. This aromatic chemical absorbs ultraviolet rays thereby preventing sunburn. However, its chemical structure and behaviour is similar to an industrial free radical generator.^[1] In Europe this chemical was withdrawn in 1989 for unstated reasons.^[1] In the US it was never approved for use in sunscreens.

Photobiology

The photobiological properties of padimate O and padimate A resemble that of Michler's ketone. These compounds have been shown to increase the lethal effects of UV-radiation on cells.^[1] This photochemistry is relevant to the sunscreen controversy.

References

^ ^a ^b ^c Knowland, John; McKenzie, Edward A.; McHugh, Peter J.; Cridland, Nigel A. (1993). "Sunlight-induced mutagenicity of a common sunscreen ingredient". FEBS Letters. 324 (3): 309–313. Bibcode:1993FEBSL.324..309K. doi:10.1016/0014-5793(93)80141-G. PMID 8405372. S2CID 23853321.

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[Knowland1993-1] Knowland, John; McKenzie, Edward A.; McHugh, Peter J.; Cridland, Nigel A. (1993). "Sunlight-induced mutagenicity of a common sunscreen ingredient". FEBS Letters. 324 (3): 309–313. Bibcode:1993FEBSL.324..309K. doi:10.1016/0014-5793(93)80141-G. PMID 8405372. S2CID 23853321.

[1]

Photobiology

See also

References