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Silver Ion 2400 / Tinosan SDC Natural Preservative
Tinosan SDC Natural Preservative, Silver Ion 2400 Natural Preservative


Product Code: TSNP-PV

1 oz Net Wt [$10.50]
2 oz Net Wt [$18.19]
4 oz Net Wt [$33.08]
8 oz Net Wt [$62.87]

Details Ingredients & Additional Information

Natural Preservative System

Tinosan SDC is now called Silver Dihydrogen Citrate or Silver Ion 2400
This is the exact same product under new licensing, so the name has now been changed.
Tinosan SDC comes directly from the manufacturer and is made here in the USA.

Texas Natural Supply has a history with this preservative spanning over 18 years.
Our R & D includes use in thousands of natural skincare formations in the cosmetic industry.
We are considered the most knowledgeable and experienced company in the world for its, so we are the company to support you with formulations and products.
We have performed extensive R & D along with efficacy testing.

Come to us for your purchase as well as usage and formulation assistance.
Not only do we manufacture our bulks bases with this preservative system, but our long efficacy record and experience in personal care with this all-natural preservative system is unmatched by any other natural preservative system on the market.

Silver Based Antimicrobial for personal care applications.

+ Formaldehyde Free
+ Paraben-Free
+ Non-Halogenated
+ No Phenols
+ No Quaternary Ammonium Compounds
+ No Nano Particles
+ No GMO's
+ No Gluten
+ No Corn sourced ingredients

Active Ingredient:
Silver dihydrogen citrate - Pure water, Silver ions (2400 ppm), and Citric acid USP at less than .01% (Pure Citrus Fruit-based derived in the USA)

low-viscosity, aqueous, colorless, transparent, heat tolerant, highly soluble in water with an almost undetectable citrus scent and no taste.

Recommended Concentration:
0.1% - 0.3% (Add to formulations during cool-down phase if possible)

At this concentration, an 8 oz bottle contains approximately 14 drops or 2 drops per ounce.

Produces crystal clear products with high water solubility
* Suitable for clear formulations (shampoos and gels)
* Does not migrate into the oil phase of emulsions
(thus maintaining a strong efficacy against microorganisms in the water phase)
* Exceptional stability in a broad range of formulation types

Produces broad-spectrum antimicrobial activity
* Works as a stand-alone preservative or can be combined with other preservatives.
* Exhibits strong activity against Corynebacteria significantly reducing body malodor for use in deodorant products.

What is Tinosan SDC (Silver Dihydrogen Citrate or Silver Ion 2400)
Tinosan SDC is a relatively new to the market as an all-natural preservative and antimicrobial based on the stabilized silver complex produced by a unique electrochemical process with silver and citric acid. It is water-soluble silver dihydrogen citrate.

It is formaldehyde-free, non-halogenated, contains no phenols and no quaternary ammonium compounds. It passed challenges tests for Gram-negative and Gram-positive bacteria, Yeast, Molds and Fungi and fulfilled USP test requirements in formulations with anionic and nonionic emulsifiers and shampoos.

Tinosan SDC provides broad-spectrum antimicrobial activity and is effective against unwanted skin bacteria and pathogenic microorganisms. Its fast-killing activity makes Tinosan SDC an effective antimicrobial for home and personal care products.

Bacteria have been exposed to silver ions for over 4 billion years and no widespread resistance has been evident to date. The risk for microbial resistance to Tinosan SDC is considered extremely low.

Tinosan SDC has meet FDA standards for these intended uses:
Applications include: Deodorant active for Personal Care Products
The antimicrobial active ingredient for Personal Care Products
Preservative for Personal Care Products
Biocide for Household and hospital products
GRAS - Generally recommended as Safe

Tinosan SDC is a colorless, odorless, low viscous liquid. It has no known adverse effects on human health and is classified as not hazardous under OSHA regulations.
Its LD50 is >5000 ml/kg. (Note: The LD50 of water is around 190 ml/kg)

In testing on humans, Tinosan SDC caused No skin or eye irritation and is not a skin sensitizer.

Usage and incorporation:
Tinosan pH = 1.4 to 1.6
Tinosan SDC comes directly from the manufacturer and is made here in the USA.
For formulas that are sensitive to acids, Silver Ion 2400 can be pre-neutralized prior to addition to the product.
Use in Skincare/personal care products @ 0.1% - 0.3%
Additionally, Tinosan SDC exhibits strong activity against Corynebacteria and significantly reduces body malodor in deodorant preparations, making it an excellent deodorant active.

Our extensive research over 18 years has shown that the efficacy of Silver Ion 2400 is
not altered if precipitation or discoloration occurs.

Minimizing light exposure and packaging in non-transparent retail packaging is optimal to deter these, but each formulation is unique and may be more prone to these reactions.

High salt (NaCl) concentrations (greater than 30%) can reduce the bactericidal activity of Silver Ion 2400

* Anionic surfactants in concentrations of 0.03% to 1% increase the biocidal efficacy of Silver Ion 2400.

* Extremely good compatibility has been shown in most formulations at a pH <7 with anionic and non-ionic surfactants, emulsifiers and amphoteric surfactants but it is compatible within all pH ranges.

* Silver Ion 2400
is compatible with many other antimicrobial actives and most other preservatives.

* Silver Ion 2400 is highly water-soluble and easy to incorporate into the aqueous phase of gels, surfactants and emulsions made by the cold process.

* In the manufacturing of emulsions produced by the hot process, Silver Ion 2400 should preferably be added to the final formulation after the emulsion has cooled down, but this is not essential and does not alter its efficacy.

The addition of Silver Ion 2400 to products with a pH lower than 8 and temps below 130 degrees are optimal in order to promote your formulation's stability and prevent possible precipitation and discoloration.

However, these parameters are not essential and the preservative system can be used in all pH ranges and temperatures.

We have had significant success with formulations outside this pH and temp range without any efficacy issues and photoreactions (pink or grey tinting) and light precipitation (small dark flecks at the bottom of the product) are infrequent but unpredictable.

Storage & Shelf Life:
Silver Ion 2400 is considered inert until combined with a formulation giving it indefinite shelf life.
It is light sensitive and should be stored in a container that protects it from light.
Final formulations sold in transparent packaging and exposure to bright light may experience a photoreaction or discoloration, but this does not decrease the antimicrobial effectiveness.
Products preserved with Silver Ion 2400 should ideally, be stored in ambient conditions and ideally used within 3 years of manufacturing.

Silver Ion 2400 has not been widely advertised because the manufacturer believes, as we do, that the product sells itself. Many smaller businesses are now using it as their primary preservative system.

For those who are not sure about how to do the math, just review the chart below.

Tinosan @ 0.3%


Total Amount to be preserved

11.52 cc

128 oz

5.76 cc

64 oz

2.88 cc

32 oz

1.44 cc

16 oz

0.72cc or 18 drops

8 oz

9 drops

4 oz

4.5 drops

2 oz

2.25 drops

1 oz

Additional Technical and Scientific Information:
Tinosan SDC is NOT colloidal Silver.
It is silver dihydrogen citrate and only contains
Silver Ions which are positively charged in a base of citric acid and water.

Colloidal Silver particles are solid silver particles suspended in a liquid with a negative charge.
Colloidal silver is a suspension of submicroscopic metallic silver particles in a colloidal base.

The Silver Ions in Silver Dihydrogen Citrate, when they come in contact with the human body (because of their positive charge), quickly combine with chloride to form an insoluble compound called silver chloride which is is basically non-reactive in the body. If ingested the hydrochloric acid in the digestive tract supplies the chloride ions that will cause ionic silver to quickly form silver chloride, an insoluble compound that will not dissolve or deposit itself in the bodies tissues and is quickly excreted by the kidneys in the urine. If ionic silver were to be absorbed into the bloodstream or interstitial spaces via the skin would encounter a large supply of chloride ions and again quickly form silver chloride and be excreted via the kidneys.

Food Allergens:
Silver Ion 2400 has been evaluated for the source of the raw materials used in production. There are no raw materials, including additives, used that have origin in peanuts, soybeans, milk, eggs, fish, shellfish, tree nuts and or wheat or gluten. Based on this examination of the ingredients and their sources, Silver Ion 2400 is free of the specified known allergy stimulating food substances.

Argyria - is caused by Colloidal Silver.

Colloidal Silver, Silver Ion 2400 does not cause or contribute to Argyria.
Argyria is a blue skin discoloration resulting from excessive exposure to silver. Silver metal workers, people who mine silver, and people who take colloidal silver supplements can all develop this rare condition. Once argyria develops, it is very challenging to treat. Continued exposure to silver either through skin contact, ingestion or inhalation can result in severe complications.

There are two types of argyria: localized and universal.

Topical treatments such as nasal sprays contain silver compounds that can cause localized argyria at the mucus membranes. Some tattoo colors also have a silver base, which can cause localized argyria. Medications now seldom include silver compounds, and reputable tattoo parlors do not employ silver in any of their dyes. Tooth fillings made from silver do contribute to slight risk for developing the condition, so as a result, fillings do not usually contain silver today.

Universal argyria occurs when people ingest silver particles in medicines or through exposure to fine silver dust. In these cases, the blue or grey color of the skin is more diffuse, but may at first be noted mostly on areas of the skin that receive sun exposure. The face, hands, and chest may all turn a bluish-gray. In the worst cases, all of the skin will turn blue, and organs like the spleen and liver may also have a bluish cast.

Average Rating: Average Rating: 5 of 5 5 of 5 Total Reviews: 10 Write a review »

  0 of 0 people found the following review helpful:
5 of 5 SDC Natural Preservative October 9, 2023
Reviewer: Anonymous Person from Idaho Falls, ID United States  
Easy navigating the website, easy ordering, fast shipping and excellent product!!

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  0 of 0 people found the following review helpful:
5 of 5 October 10, 2021
Reviewer: Cristy C Trujillo from Brookings, OR United States  

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  0 of 0 people found the following review helpful:
5 of 5 Love it! April 18, 2021
Reviewer: Jeannine Duke from Sammamish, WA United States  
I have been using silver for 24 years now. I feel good using this product in all my skin care products.

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  2 of 2 people found the following review helpful:
5 of 5 Amazing April 14, 2019
Reviewer: Alisha from Plano, TX United States  
Odorless and so easy to use. It may seem like an expensive buy but you use very little (drops actually!) compared to other preservatives. I love that it’s so safe to use.

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  1 of 1 people found the following review helpful:
5 of 5 January 16, 2019
Reviewer: Roxanne Ray from Houston, TX United States  
Simple to use

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