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Safety Assessment of Lecithin and Other Phosphoglycerides As Used in Cosmetics

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Safety Assessment of Lecithin and Other Phosphoglycerides As Used in Cosmetics Safety Assessment of Lecithin and Other Phosphoglycerides as Used in Cosmetics Status: Draft Report for Panel Review Release Date: November14, 2014 Panel Date: December 8-9, 2014 The 2014 Cosmetic Ingredient Review Expert Panel members are: Chair, Wilma F. Bergfeld, M.D., F.A.C.P.; Donald V. Belsito, M.D.; Ronald A. Hill, Ph.D.; Curtis D. Klaassen, Ph.D.; Daniel C. Liebler, Ph.D.; James G. Marks, Jr., M.D.; Ronald C. Shank, Ph.D.; Thomas J. Slaga, Ph.D.; and Paul W. Snyder, D.V.M., Ph.D. The CIR Director is Lillian J. Gill, D.P.A. This report was prepared by Wilbur Johnson, Jr., M.S., Senior Scientific Analyst, and Bart Heldreth, Ph.D., Chemist. © Cosmetic Ingredient Review 1620 L STREET, NW, SUITE 1200 ◊ WASHINGTON, DC 20036-4702 ◊ PH 202.331.0651 ◊ FAX 202.331.0088 ◊ [email protected] Commitment & Credibility since 1976 Memorandum To: CIR Expert Panel Members and Liaisons From: Wilbur Johnson, Jr. Senior Scientific Analyst Date: November 14, 2014 Subject: Draft Report on Lecithin and Other Phosphoglycerides A Scientific Literature Review (SLR) on Lecithin and other Phosphoglycerides was issued on September 14, 2014. Use concentration data were received from the Council prior to issuance of the SLR, and updated data were received during the 60-day comment period. Specifications for lecithin and related phosphoglycerides were also received from the Council. This safety assessment (draft report) is identified as lecith122014rep in the pdf document. Included in this package for your review is the Draft Report (lecith122014rep pdf file), the CIR report history (lecith122014hist pdf file), Literature search strategy (lecith122014strat pdf file), Ingredient Data profile (lecith122014prof pdf file), 2014 FDA VCRP data (lecith122014FDAdata pdf file), Comments from the Council (lecith122014pcpc1 pdf file), Use Concentration data (lecithl122014data1 and lecith122014 data2 pdf files), and Specifications on lecithin and related phosphoglycerides (lecith122014data3 pdf file). Comments received from the Council (lecith122014pcpc1pdf file) have been addressed. After considering the data included in this safety assessment, the Panel needs to determine whether an insufficient data announcement should be issued, or whether the available data are sufficient for issuing a tentative report with a safe as used, safe with qualifications, or unsafe conclusion on these ingredients. __________________________________________________________________________________________ 1620 L Street, N.W., Suite 1200, Washington, DC 20036 (Main) 202-331-0651 (Fax) 202-331-0088 (Email) [email protected] (Website) www.cir-safety.org Distributed for comment only -- do not cite or quote Distributed for comment only -- do not cite or quote CIR History of: Lecithin and Other Phosphoglycerides A scientific literature review (SLR) on Lecithin and other Phosphoglycerides was issued on September 14, 2014. Use concentration data were received from the Council prior to issuance of the SLR, and updated data were received during the 60-day comment period. Specifications for lecithin and related phosphoglycerides were also received from the Council. Draft Report, Belsito and Marks Teams/Panel: December 8-9, 2014 The Draft Report contains the use concentration data and specifications on Lecithin and related Phosphoglycerides that were received from the Council. Comments received from the Council have been addressed. Distributed for comment only -- do not cite or quote Lecithin and Other Phosphoglcerides Check List for December, 2014. Analyst – Wilbur Johnson Repeated dose Acute toxicity Irritation Sensitization toxicity Penetration Skin Enhancement Penetration ADME Oral Parenteral Dermal Inhale O Irritation Ocular Animal Dermal Irr. Human Dermal Irr Animal Sensitization Human Sensitization toxicity Repro/Devel Genotoxicity ty Carcinogenici Phototoxicity Parenteral Dermal Inhale ral Lecithin X X X X X X X X Hydrogenated Lecithin X X X X X Lysolecithin X X Hydrogenated Lysolecithin Phospholipids X X Hydrolyzed Phospholipids Phosphatidic Acid X X Lysophosphatidic Acid X Phosphatidylglycerol Lysophosphatidyl- glycerol Phosphatidylserine X X X X X X X Ammonium Phosphatidyl Rapeseedate Phosphatidylcholine X X Hydrogenated Phosphatidylcholine Hydrogenated Lysophosphatidyl- choline Lysophosphatidyletha- nolamine Phosphatidylinositol X Distributed for comment only -- do not cite or quote Literature Searches on Lecithin and Other Phosphoglycerides (8/14/2014) SciFinder/PubMed Searches Search Terms Lecithin Lysophosphatidylglycerol Hydrogenated Lecithin Phosphatidylserine Lysolecithin Ammonium Phosphatidyl Rapeseedate Hydrogenated Lysolecithin Phosphatidylcholine Phospholipids Hydrogenated Phosphatidylcholine Hydrolyzed Phospholipids Hydrogenated Lysophosphatidylcholine Phosphatidic Acid Lysophosphatidylethanolamine Lysophosphatidic Acid Phosphatidylinositol Phosphatidylglycerol Search Updates Search updated on 10/30/2014 Distributed for comment only -- do not cite or quote Safety Assessment of Lecithin and Other Phosphoglycerides as Used in Cosmetics Status: Draft Report for Panel Review Release Date: November14, 2014 Panel Date: December 8-9, 2014 The 2014 Cosmetic Ingredient Review Expert Panel members are: Chair, Wilma F. Bergfeld, M.D., F.A.C.P.; Donald V. Belsito, M.D.; Ronald A. Hill, Ph.D.; Curtis D. Klaassen, Ph.D.; Daniel C. Liebler, Ph.D.; James G. Marks, Jr., M.D.; Ronald C. Shank, Ph.D.; Thomas J. Slaga, Ph.D.; and Paul W. Snyder, D.V.M., Ph.D. The CIR Director is Lillian J. Gill, D.P.A. This report was prepared by Wilbur Johnson, Jr., M.S., Senior Scientific Analyst, and Bart Heldreth, Ph.D., Chemist. © Cosmetic Ingredient Review 1620 L STREET, NW, SUITE 1200 ◊ WASHINGTON, DC 20036-4702 ◊ PH 202.331.0651 ◊ FAX 202.331.0088 ◊ [email protected] Distributed for comment only -- do not cite or quote INTRODUCTION The safety of lecithin and other phosphoglycerides, listed below, in cosmetics is reviewed in this safety assessment. These 17 ingredients function mainly as skin and hair conditioning agents, emulsifying agents and surfactants in cosmetic products. • Lecithin • Lysophosphatidylglycerol • Hydrogenated Lecithin • Phosphatidylserine • Lysolecithin • Ammonium Phosphatidyl Rapeseedate • Hydrogenated Lysolecithin • Phosphatidylcholine • Phospholipids • Hydrogenated Phosphatidylcholine • Hydrolyzed Phospholipids • Hydrogenated Lysophosphatidylcholine • Phosphatidic Acid • Lysophosphatidylethanolamine • Lysophosphatidic Acid • Phosphatidylinositol • Phosphatidylglycerol The Cosmetic Ingredient Review (CIR) Expert Panel has evaluated the safety of lecithin and hydrogenated lecithin in cosmetics and issued a final report (published in 2001) with the following conclusion: Lecithin and hydrogenated lecithin are safe as used in rinse-off products, safe for use in leave-on products at concentrations of ≤ 15%, and the data are insufficient to determine the safety of use in cosmetic products where lecithin and hydrogenated lecithin are likely to be inhaled; lecithin and hydrogenated lecithin should not be used in cosmetic products in which N-nitroso compounds may be formed.1 Some of the data in the final report are included (italicized in text) in this safety assessment on lecithin and other phosphoglycerides. CHEMISTRY Definition and Structure The ingredients in this report are glycerides of fatty acids, linked to phosphoric acid or to a phosphoric ester. Lecithin, for example, is a naturally occurring mixture of the diglycerides of stearic, palmitic, and oleic acids, linked to the choline ester of phosphoric acid, and is found in plants and animals.1 In naturally occurring lecithins, the phosphoric acid is attached to the glycerol at the α-position. However, the phosphoric acid can also be attached in the β-position of glycerin.2 The structures of α- and β-lecithin are shown in Figure 1. Figure 1. Positional isomers of Lecithin, wherein RC(O)- represents the residue of a fatty acid. Hydrogenated lecithin (CAS No. 92128-87-5) is the end product of the controlled hydrogenation of lecithin.1 Distributed for comment only -- do not cite or quote Despite the ionic, or even zwitterionic, natures of these ingredients, they are mostly insoluble in water.3 These ingredients typically are waxy, hygroscopic substances that swell in contact with water to form liposomes. The main sources of naturally-occurring phosphoglycerides, such as lecithin, as used in personal care products, are soybean, maize, and egg yolk.4 Synthetic phosphoglycerides can be produced via phospholipase D-catalyzed transphosphatidylation of phosphatidylcholine (which is abundant in soy lecithin) with the desired phosphate substituent (e.g., myo-inositol for the synthesis of phosphatidylinositol).5 The definitions, structures and functions of the phosphoglycerides reviewed in this safety assessment are included in Table 1.6 There is some overlap among the ingredients in this report. While phosphatidylserine and phosphatidylcholine are listed as separate ingredients, they are likely components of the ingredient phospholipids. Chemical and Physical Properties Specifications for lecithin and related ingredients are presented in Table 2.7,8,9,10,11,12,13,14,15,16 Included are chemical and physical properties data and microbiological specifications. In Table 2, measurements of toluene-insoluble or hexane- insoluble matter indicate the total impurity content (including protein) of lecithin and related ingredients. Method of Manufacture Lecithin and Lecithin (enzyme-modified) Commercial lecithin is isolated as a
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