Trade name(s) of preservative: Microgard, Geogard Ultra, Neodefend
INCI name: gluconolactone (and) sodium benzoate
Form: Powder
Solubility: Water-Soluble
Usage and phase: 2% Cool down (dissolve in water before adding)
Works within pH range: below pH 5
Natural or synthetic? Natural
Protects against:
– gram positive bacteria? Yes
– gram negative bacteria? No
– mould? Partially
Further details: Frequently causes pH drift downwards. Cover the gram negative bacteria gap with phenoxyethanol or 1% phenyl ethyl alcohol.