Cosgard Preservative
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Antibacterial and broad-spectrum antifungal, it helps prevent the growth of bacteria, yeast, and mould in cosmetic products containing water.
Preservation of emulsions (creams, milks)
Preservation of cleansing products (shampoos, shower gels, make-up removers)
Preservation of aqueous gels and lotions
General characteristics
Dosage
0.2 to 1% Recommended dosage: 0.6% (of the total weight of your preparation)
The pH of the formula must be ≤ 7
for optimal effectiveness.
Water soluble
Soluble at 1% in water
Soluble in alcohol
Density
1.03 - 1.08
1 ml = approximately 33 drops
Insoluble in oil
Use in homemade cosmetics
Creams & milks, gels, lotions, shower gels, shampoos
Associations
With raw materials: Very good compatibility; compatible with all emulsifiers and gums.
With bottles/containers: Cosgard Pur is incompatible with PET plastic. Do not pour Cosgard Pur into crystal PET, white PET, or blue PET bottles, and do not add it directly to a hydrosol or preparation in the bottle. To incorporate Cosgard into a preparation or hydrosol: transfer the product to a stainless steel bowl, add the preservative, stir thoroughly until fully dissolved, then transfer the product back to the bottle. Once properly diluted in a preparation, it can safely be stored in a PET bottle.
Note: If your hydrosol comes out of the refrigerator, wait until it returns to room temperature before adding the preservative to ensure it dissolves correctly.
Precautions
Precautions and allergens
Precautions for use
Allergens
Allergen-free
Add to the finished formula when cold and mix well to homogenise.
Influence on the pH of aqueous preparations: Slightly decreases the pH.
0.6% Cosgard | 0.18 g, or approximately 6 drops |
0.6% Cosgard | 0.3 g, or approximately 10 drops |
0.6% Cosgard | 0.6 g, or approximately 19 drops |
Quality
Synthetic, cosmetic grade, approved by Ecocert for organic cosmetics.
Function
A broad-spectrum antibacterial and antifungal preservative, it ensures the preservation of cosmetic preparations containing an aqueous phase (water, hydrosol).
Composition
Benzyl alcohol, dehydroacetic acid, water.
INCI designation
Benzyl alcohol, Dehydroacetic acid, aqua (Water).
Presentation
A pale yellow to dark yellow liquid with a characteristic odour, packaged in a glass bottle with a dropper and child-resistant cap.
Find out more
Challenge test carried out by our supplier
The manufacturer has validated the effectiveness of this preservative as a bactericide through a "challenge test".
Challenge test: exposing a cosmetic formula to bacterial attacks in order to test and validate the preservative system.
Formulas tested:
Day cream (oil-in-water emulsion) with 1% Cosgard
Shampoo with 1% Cosgard
Microorganisms inoculated:
Gram +: Staphylococcus aureus (ATCC 6538)
Gram -: Escherichia coli (ATCC 8739) and Pseudomonas aeruginosa (ATCC 9027)
Yeasts: Candida albicans (ATCC 10231)
Molds: Aspergillus niger (ATCC 16404)
Results:
The reduction in bacterial load complies with CTFA (Cosmetic, Toiletry and Fragrance Association) recommendations and European Pharmacopoeia criteria (Ph. Eur. 6) in all cases. This means that Aroma-Zone Cosgard can be used to effectively preserve (i.e., without microbial contamination) conventional emulsions and shampoos. Stable emulsions containing 1% of this extract can be stored without microbial contamination for many months, even at room temperature. It is always best to store your preparations in a cool, dark place. However, if your emulsion is not stable (phase separation), it can no longer be stored.
Preservation
Store at room temperature away from moisture and light. Close the bottle tightly after use.
Precautions
Please note that benzyl alcohol is a potential allergen, so it is essential to perform an allergy test on the inside of your arm (test the finished product or the preservative diluted to 1%) and wait at least 24 hours (ideally 48 hours) to observe any possible reaction.
Keep out of reach of children.
Do not swallow or inhale, and avoid contact with the eyes.
Follow the recommended doses.
Dangerous. Follow the precautions for use.
Harmful if swallowed. Harmful if inhaled.
Environmental qualities and characteristics product sheet
Reference
01483 - Cosgard 5 mL
Main Packaging Material
Glass bottle
Recyclability
Most packaging can be recycled
Reference
01484 - Cosgard 30 mL
Main Packaging Material
Glass bottle
Recyclability
Most packaging can be recycled
Reference
01485 - Cosgard 100 mL
Main Packaging Material
Glass bottle
Recyclability
Most packaging can be recycled
Supplier documentation
Frequently Asked Questions
Essential Oils
1 ml = approximately 35 drops (with our Aroma-Zone dropper caps)
Carrier Oils
1 pump (Aroma-Zone aluminium pump) = approx. 0.15 ml
Mass / Volume conversion (for a liquid)
Mass (g) = Density x Volume (ml) at 20°C
Further information
1 full teaspoon = between 3 and 4.5 ml
1 full tablespoon = between 7.5 and 10 ml
However, these spoon ratios depend on a number of factors (e.g. viscosity of the liquid, temperature, depth and size of the spoon, rheological behaviour of the liquid), and we strongly advise you to use precise measuring equipment, such as graduated test tubes, graduated pipettes, and precision scales.
Good preservative
Very good preservative
Excellent product that I have been using for years for making DIY products for personal use.
It mixes very well into preparations
Hair gel too
Associated product
£9.00
30 ml
