Magnesium Hydroxide | CAS 1309-42-8 | E528, Acidity Regulator - - PREMIUM INGREDIENT

Magnesium Hydroxide | Cas 1309-42-8 | E528 | Mild pH Adjuster & Magnesium Fortifier

Categories:

Acidulants Mineral products

CAS No:

1309-42-8

3 / 1

Description

Basic Info

Characteristics

Hazard Identification

Handling and Storage

Basic Information

English Name	Magnesium Hydroxide
Synonyms	Magnesium Hydrate, Hydroxide Magnesium
CAS Number	1309-42-8
E Number	E528
EC Number	215-170-3
Molecular Formula	Mg(OH)₂
Molecular Weight	58.32 g/mol
Appearance	White, fine, amorphous powder
Solubility	Very slightly soluble in water
pH	Approximately 9.0 – 10.5 (saturated solution)
Purity	Food grade / Pharmaceutical grade available

Product Overview

Magnesium Hydroxide (Cas No.:1309-42-8, E No.: E528), is a high-purity white fine powder, offered in food grade. It is a mild alkaline mineral that provides gentle pH buffering without sharp pH fluctuation. Widely used as mild pH adjuster, magnesium mineral fortifier and anti-caking agent, it is mainly applied in dietary supplements, multivitamin and mineral premixes, breakfast cereals and powder formulations. It is sparingly soluble in water and keeps stable under normal food processing conditions.

Specification:

Grade	Purity (min)	MgO Content	Moisture	pH	Main Standard
Food Grade	96.0%	65.0%	2.0% max	9.0 – 10.5	FCC / EU Food Additive
Pharmaceutical Grade	98.0%	66.0%	1.5% max	9.5 – 10.5	USP / EP / JP

Character

1.White fine powder, odorless and tasteless.

2.Weak alkaline in aqueous system (pH around 9.5–10.5 for saturated solution), providing gentle and controllable acid neutralization.

3.Strong buffering capacity against acid, avoiding sudden pH jump in food systems.

4.Sparingly soluble in water, mainly suitable for solid, semi-solid and powder formulations rather than clear beverages.

5.Good thermal and storage stability, no strong odor, no harsh irritation.

6.Fine particle size contributes to good dispersion in powder premixes and anti-caking performance.

7.Food grade complies with international standards for pH regulators, mineral fortifiers and anti-caking agents.

Main Functions

1.pH Adjusting & Buffering Function: Acts as mild alkali to adjust and buffer acidity in food systems, avoiding sharp pH fluctuation and improving formulation stability.

2.Magnesium Fortification Function: Provides bioavailable magnesium mineral for nutritional enrichment in food, beverage and dietary supplement formulations.

3.Anti-Caking Function: Prevents powder agglomeration, maintains free-flowing property for mineral premixes, powder drinks and blended powder products.

4.Flavor Stabilizing Function: Neutralizes free acidic substances in powder blends, suppresses unpleasant off-odor formation and stabilizes the original flavor of finished products.

Applications

Food & Dietary Supplement Industry : Magnesium Hydroxide is mainly applied in dietary supplements, multivitamin and mineral powder premixes, breakfast cereals, solid beverages and blended powder products. It serves as a mild pH adjuster to buffer acidity, as a magnesium source for mineral fortification, and as an anti-caking agent to keep powder blends free-flowing during production, filling and storage.

Dairy & Bakery: It is occasionally used as pH regulator and mineral supplement in processed dairy, bakery mixes and infant nutrition products where mild alkalinity is required.

Industrial Field: Industrial grade Magnesium Hydroxide is used in flue gas desulfurization, wastewater treatment and flame retardant applications, with non-food consumption outside our main supply scope.

Packaging & Storage

Packaging: 25kg paper bag / drum with inner PE liner

Storage: Store in cool, dry, ventilated area. Keep sealed. Protect from moisture and direct sunlight.

Product Name:	Magnesium hydroxide	Other Name:	Magnesium hydroxide (Mg(OH)2);Magnesium hydroxide;Magnesia Magma;Milk of magnesia;Marinco H 1241;Magnesium dihydroxide;Marinco H;S/G 84;Magnesia hydrate;Kisuma 5A;Ki 22-5B;Kyowamag F;Milmag;Kisuma 4AF;Star 200;Kisuma 7B;Lycal 96HSE;Kisuma 5E;Kisuma 5;Magnesiamaito;Asahi Glass 200-06;Combustrol 500;NF 2000;KX 4S;Kisuma S 4;Versamag;KX 80;KX 8S(A);KX 8S(B);Martinal VPF 8812;Kisuma 5BG;Magstar 10;Kisuma 5B-N;Magnifin H 7;Magnifin H 10;FloMag H;FloMag HUS;Alcanex NHC 25;PT 25ST;Magnesium(II) hydroxide;Zerogen 30F;Magstar 5;Kisuma 3A;Daimushew 6000;Kisuma 5EU;Star Brand 100;Kisuma 5A-N;Magnifin H 5;Magseeds N 1;DP 393;Magnifin H 5KV;Z 00-06H;Star Brand 200;Ebson RF;Zerogen 60;PG 91146;Duhor;Magnifin SE 630;DSB 100;Duhor N;MagneClear 58;Magnifin H 5L;N 3;Kisuma 5AU;Hydrofy G 2.5;N 0;Hydrofy G 1.5;N 0 (curing accelerator);Hydrofy N;MH 95-002;N 1;Mag Chem MH 10;Kisuma 120;Zerogen 51;SP;MS 4;Zerogen 10;Zerogen 10SP;SP (hydroxide);MS 4 (hydroxide);200-06H;VD 650;Kisuma 2;10A;Magseeds N 3;Kisuma;UB 650;FR 20-310;Kisuma KX 4SU;Magseeds N 4;SX 30MS;Finemag MO-T;Finemag SN-L;Odomag;Kisuma 54A;Kisuma 6E;Mint-O-Mag;Phillips Milk of Magnesia Liquid;Lederscon;Phillips Magnesia Tablets;Zerogen 50SP;UD 650;Kisuma 8N;Magshield 98;Kisuma 5L;Apymag AOH 820;Echomag ZL;Burusaito;Zerogen Vertex;Magnifin A;Magstar;Finemag MO;Z 50SP;MH 3;Maglux ST;Maglux;Magnifin H 5HV;Novadol;Kiyouwasuimagu F;FD 905U;12195-86-7;13760-51-5;1395893-88-5
CAS No.:	1309-42-8	Molecular Formula:	H2MgO2
InChIKeys:	InChIKey=VTHJTEIRLNZDEV-UHFFFAOYSA-L	Molecular Weight:	58.31970
Exact Mass:	57.99050	EC Number:	215-170-3
Categories:	Anticaking Agent

PSA:	40.46000	XLogP3:	-0.35360
Appearance:	Odourless, white bulky powder	Density:	3″>2.36 g/cm3
Melting Point:	350 °C (decomp)	Boiling Point:	100ºC at 760mmHg
Flash Point:	will not burn	Water Solubility:	H2O: 5 M HCl: 0.1 M, clear, yellow \| 0.9 mg/100 mL (18 ºC)
Storage Conditions:	Store in a cool, dry, well-ventilated area away from incompatible substances. Keep containers tightly closed.	Odor:	Odorless
PH:	pH = 9.5-10.5 (aqueous slurry)

Classification of the substance or mixture

Not classified.

GHS label elements, including precautionary statements

Precautionary statement(s)
Pictogram(s)	No symbol.
Signal word	No signal word
Hazard statement(s)	none
Prevention	none
Response	none
Storage	none
Disposal	none

Other hazards which do not result in classification

no data available

Precautions for safe handling

Handling in a well ventilated place. Wear suitable protective clothing. Avoid contact with skin and eyes. Avoid formation of dust and aerosols. Use non-sparking tools. Prevent fire caused by electrostatic discharge steam.

Conditions for safe storage, including any incompatibilities

Store the container tightly closed in a dry, cool and well-ventilated place. Store apart from foodstuff containers or incompatible materials.