INCI Name
Citric Acid (and) Aq...
Functions
3 Roles
Sustainability
9/10
Category
general
What It Does
Citric Acid (and) Aqua is a pre-dissolved aqueous solution of citric acid, a naturally occurring alpha-hydroxy acid originally derived from citrus fruits but now commercially produced through fermentation of sugar substrates. This ready-to-use solution eliminates the need for formulators to dissolve crystalline citric acid, ensuring consistent pH adjustment and chelation performance while preventing undissolved particles. Its dual functionality as both a pH buffer and metal chelator makes it particularly valuable in formulations containing iron-sensitive ingredients or those requiring precise acidic pH maintenance.
Technical Properties
pH Range
1.5-3.5
Optimal working range
Ionic Charge
anionic
Molecular charge type
Viscosity Effect
neutral
Impact on formula thickness
Foaming Ability
none
Lather generation
Ingredient Compatibility
Known Interactions
Casein precipitates at pH < 4.6. Citric acid beverages will cause immediate, irreversible curdling. Use plant protein or hydrolyzed whey for acidic drinks.
High concentrations of Citric Acid (pH < 3.5) can kill acid-sensitive probiotic strains (Lactobacillus, Bifidobacterium) during shelf life. Use acid-resistant strains or enteric coating if combining.
Whey protein denatures and precipitates below pH 4.6 (its isoelectric point). Citric acid-based beverages at pH 3-4 will cause visible protein aggregation. Use hydrolyzed whey or plant protein for acidic beverages.
High Calcium + Citric Acid can form calcium citrate precipitate in beverages, causing cloudiness or sedimentation. Manageable with proper formulation (sequestrants, pH control), but test stability.
Sustainability Profile
Sustainability Score
Biodegradability
readily biodegradable
Source
fermentation
Feedstock
renewable biomass
Related Ingredients
Similar ph adjusters to explore
Quick Reference
- Full INCI Name
- Citric Acid (and) Aqua
- Common Name
- Citric Acid Solution
- Category
- general
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