INCI Silver Citrate and Citric Acid
Tinosan SDC is a preservative based on a stabilized silver complex produced by an electrochemical process with silver and citric acid. It is a water soluble silver salt of citric acid containing 2400ppm silver ions. It is not a colloidal silver solution.
Tinosan SDC provides a broad spectrum antimicrobial activity and is effective against unwanted skin bacteria especially cornybacterium and pathogenic micro organisms. Its fast killing activity makes Tinosan SDC an effective antimicrobial for home personal care products. In the US, Tinosan SDC can be used as a deodorant active or a preservative. As a standalone preservative, it is used at levels of 0.1 0.3 and can be combined with other preservatives if needed. Unlike many paraben- containing preservatives, Tinosan SDC will not migrate into the oil phase of emulsions, thus maintaining strong efficacy against microorganisms in the water phase.
Tinosan SDC shows good compatibility in most formulations at a pH below 7 with anionic and nonionic surfactants, emulsifiers and with amphoteric surfactants. Tinosan SDC is compatible with many other antimicrobial actives and most preservatives. Combination of Tinosan SDC with cationic ingredients and incorporation in formulations with pH above 7 should be avoided. It is compatible with xanthan gum and many acrylate polymer thickeners, but incompatibilities may exist with cellulose HEC, HPMC and starch derivatives, as well as cationic guar and strongly cationic systems.
Exposure of Tinosan SDC or Tinosan SDCcontaining formulations to light should be avoided and the product should preferably be stored in containers that provide protection against light. Final formulations should be tested for light stability in case they are sold in transparent packaging.
Tinosan SDC is highly water soluble and easy to incorporate into the aqueous phase of gels, surfactants and emulsions made by a cold process method.
In the manufacturing of emulsions produced by hot processes, it should be added to the final formulation after the emulsion has cooled down below 50C
For formulations sensitive to acids, Tinosan SDC can be preneutralized prior to addition to the product. (note it has a very low (acidic) pH)
Exposure of Tinosan SDC to pHs higher than 7 and temperatures above 50C should be avoided in order to achieve optimal formulation stability.
Please expect delays of up to 7-9 days for sizes 1kg and above
Creams and Lotions not cationic emulsions, Gels, Serums, Facial Products, Body Sprays and Mists Shower Gels and Shampoos.
Recommended usage level
Skin Care products 0.1 - 0.3% Home Care products 0.1 -0.5%
Appearance Colorless, low viscosity liquid with a very faint citrus scent.
pH 1.4 1.8
Soluble in water. Miscible with ethanol, glycerin, and propylene glycol
Tinosan SDC is an approved preservative in the US. It is currently not on the European or Japanese positive preservative list. In Europe Tinosan SDC can be used as an antimicrobial active in all types of rinse off and leave on cosmetic products or for its deodorant properties. In Japan it can be used for soft claims, for example, malodor protection.