generalStandard

Citric Acid (and) Aqua

Citric Acid Solution

ph adjusterchelating agentpreservative

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.

Optimizes formula stability
Ensures skin compatibility
Maximizes ingredient efficacy
Prevents irritation

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

CASEINIncompatiblePrecipitation

Casein precipitates at pH < 4.6. Citric acid beverages will cause immediate, irreversible curdling. Use plant protein or hydrolyzed whey for acidic drinks.

PROBIOTICSUse CautionDegradation

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 PROTEINUse CautionPrecipitation

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.

CALCIUMNotePrecipitation

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.

Compatibility analysis powered by OpenMix — open-source formulation science

Sustainability Profile

Sustainability Score

9/10

Biodegradability

readily biodegradable

Source

fermentation

Feedstock

renewable biomass

Quick Reference

Full INCI Name
Citric Acid (and) Aqua
Common Name
Citric Acid Solution
Category
general

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