Preservative K712


Active substance Sodium benzoate Potassium sorbate
INCI: Sodium benzoate Potassium sorbate
CAS: 532-32-1 24634-61-5


Physical properties and quality indicators

Appearance: yellowish to brown transparent liquid

pH: 8-10 Active substance content: >45%

Density: 1.164~1.186 (20 C.G/cm3)

Solubility : soluble with water and alcohols


Product features

K712 is a liquid cosmetic preservative, which can be used in leave-on as well as in rinse-off products.

K712 is is developed for use in cosmetic formulations with a skin-friendly pH value of up to 5.5.

K712 has a broad, balanced spectrum of effect against bacteria, yeasts and mould fungi.

K712 is food grade formula, recognized as mild antiseptic and antibacterial substance

K712 is compatible with anion, cation, and non-ion systems, more widely used

K712 is compatible with various personal care products including surfactants, ZPT and UV

K712 is comply with domestic and international laws and regulations under regular usage, no pollution to the environment


Application scope

K712 is fully effective both in anionic as well as cationic and non-ionic systems.

K712 is fully soluble in water and in most polar organic solvents.

K 712 exhibits no interaction with sulphite ions.

K 712 has no colour stability. The concentrate is a clear yellowish until brownish liquid with tendency to discolouration. When used in the cosmetic preparation it doesn’t lead to further discolouration as long as the formulation remains acidic.

K 712 proved to have good compatibility with anionic surfactants such as sulphates,

ether sulphates and sulphosuccinates, as well as with non-ionogenic surfactants.

K712 is applicable in high-end hair washing products, ZPT anti-dandruff shampoos, cleansing products, facial creams, especially products containing UV absorbers, various wet wipes, tissues, facial masks, skin creams, gel products (hair sprays, gel water, gels) Products) and so on.



Microbial name Ec Sa Pa Tr Ab Ca
Minimum inhibitory concentration (MIC)(%) 0.8 0.7 0.9 0.7 0.7 0.6


Microbial challenge test

K712 1.2% used in different products

Cleanser Conditioner Shampoo Cream Toner Hair Spray
3d Bacterial 2×103 2×103 1×103 1×103 1×103 1×103
Fungus 2×103 2×103 1×103 1×103 1×103 1×103
7d Bacterial 1×102 1×102 2×102 2×102 2×102 1×102
Fungus 2.5×102 1.5×102 2.5×102 1.2×102 55 40
14d Bacterial 115 80 60 65 <10 <10
Fungus <10 <10 <10 <10 <10 <10
21d Bacterial <10 <10 <10 <10 <10 <10
Fungus <10 <10 <10 <10 <10 <10
28d Bacterial <10 <10 <10 <10 <10 <10
Fungus <10 <10 <10 <10 <10 <10


Irritating note

K712 is non-toxic to human body and generally non-allergenic.

CAMVA (chicken embryo chorioallantoic membrane vascular experiment) 0.8%-1.110 (NC value) 0.12%- 1.629 (NC value)

Patch test evaluation 0.8%–6 hours/12 hours negative 0.12%–6 hours/12 hours negative


Regulatory limit

In China’s “Cosmetics Safety Technical Specification 2015” regulations and relevant EU and US regulations, the maximum amount added for K712 is 2.0%


Instructions for use

The conventional addition amount of K712 variety is 0.8~0.12%.

In products that are susceptible to fungal contamination, K712 can be added 1.5% of paper or used in combination with other preservatives.

When the final product PH>5.5, it will reduce the preservative effect.

Add K712 to product below 80°C. The information given in this introduction is accurate. The amount of use and suitable products are references provided by China Resources based on years of experience in the production of professional preservatives. It is recommended that the user conduct experimental verification according to his actual situation to ensure the anti-corrosion effect.


Product specification & storage conditions

Plastic drum packaging 25kg/ barrel 200kg/bucket

Avoid light, dry, ventilated preservation, normal temperature, shelf life of 24 months.