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Polyglycerol Fatty Acid Ester, PGE, Polyglycerol Ester, Decaglyceryl Dipalmitate, PGE, E475, 67784-82-1

Polyglycerol Fatty Acid Ester, PGE, Polyglycerol Ester, Decaglyceryl Dipalmitate, PGE, E475, 67784-82-1

POLYGLYCEROL FATTY ACID ESTER (PGE - E475)

PRODUCT IDENTIFICATION INFORMATION

Parameter Information
Product Name Polyglycerol Fatty Acid Ester
Chemical Name Polyglycerol Esters of Fatty Acids
Synonyms (Turkish) Poligliserol Yağ Asidi Esterleri, Poligliserol Ester, PGE, E475
Synonyms (English) Polyglycerol Fatty Acid Ester, Polyglycerol Esters of Fatty Acids, PGE, Polyglycerol Ester, Polyaldo, Decaglyceryl Dipalmitate
E Number E475
CAS Number 67784-82-1
EC Number 211-708-6
Molecular Formula (C₃H₈O₃) (variable, polymer)
Appearance Light yellow to amber liquid; Light brown to brown plastic or soft solid; Light brown to hard waxy solid
Odor Characteristic mild odor

CHEMICAL STRUCTURE

Polyglycerol Fatty Acid Ester Structure (General Representation):

                O
                ||
    HO—CH₂—CH—CH₂—O—C—R
           |
           O
           |
    HO—CH₂—CH—CH₂—O—C—R
           |
           O
           |
    HO—CH₂—CH—CH₂—O—C—R

Structure Description:

  • Esters formed by the reaction of polyglycerol (polymerized glycerol) with fatty acids.

  • Polyglycerol chain: (C₃H₈O₃)n where n is the degree of polymerization.

  • Fatty acid groups (R = C₆-C₁₈, saturated/unsaturated, linear/branched).

  • Non-ionic emulsifier.

  • Hydrophilic (polyglycerol) and lipophilic (fatty acid) balance depends on polymerization degree, fatty acid type, and esterification degree.

  • Completely biodegradable.

SECTION 1: CHEMICAL IDENTITY AND DESCRIPTION

Parameter Information
Product Name Polyglycerol Fatty Acid Ester
Chemical Name Polyglycerol Esters of Fatty Acids
Synonyms (Turkish) Poligliserol Yağ Asidi Esterleri, Poligliserol Ester, PGE, E475
Synonyms (English) Polyglycerol Fatty Acid Ester, Polyglycerol Esters of Fatty Acids, PGE, Polyglycerol Ester, Polyaldo, Decaglyceryl Dipalmitate
E Number E475
CAS Number 67784-82-1
EC Number 211-708-6
Molecular Formula (C₃H₈O₃) (variable, polymer)
Chemical Class Non-ionic emulsifier; Polyglycerol ester; Food additive
Source Synthetic (esterification of polyglycerol with fatty acids)
Physical State (20°C) Liquid to waxy solid (depends on composition)
Odor Characteristic mild odor
Color Light yellow to amber (liquid); Light brown to brown (solid)

SECTION 2: PHYSICAL AND CHEMICAL PROPERTIES

Property Value Test Method / Note
Appearance Light yellow to amber liquid; Light brown to brown plastic or soft solid;
Light brown to hard waxy solid
Visual
Odor Characteristic mild odor Olfactometric
Molecular Weight Variable (polymer; depends on degree of polymerization)
Density (20°C) ~0.95 – 1.05 g/cm³ (liquid) ASTM D4052
Melting Point Variable (depends on fatty acid chain length)
Solubility in Water Insoluble; Dispersible General Method
Solubility in Ethanol Soluble General Method
Solubility in Oils/Fats Soluble General Method
Solubility in Organic Solvents Soluble General Method
HLB Value 2 – 16 (varies by composition)
pH (Dispersion) ~5.0 – 7.0 pH Meter
Stability Good thermal stability; Stable under acidic conditions; Not easily hydrolyzed
Hydrophilic/Lipophilic Ranges from extremely hydrophilic to extremely lipophilic
Biodegradability Completely biodegradable
Heavy Metals (as Pb) ≤ 10 ppm AAS / ICP
Arsenic (As) ≤ 2 ppm AAS / ICP
Lead (Pb) ≤ 2 ppm AAS / ICP
Acid Value ≤ 5.0 mg KOH/g Titrimetric
Saponification Value Variable (depends on fatty acid) Titrimetric
Hydroxyl Value Variable (depends on esterification degree) Titrimetric
Loss on Drying ≤ 0.5% Gravimetric

SECTION 3: PGE (E475) vs OTHER EMULSIFIERS

Property Polyglycerol Fatty Acid Ester (PGE - E475) Mono- & Diglycerides (E471) Sorbitan Esters (E491-495) PGPR (E476)
CAS Number 67784-82-1 Various Various 29894-35-7
Type Non-ionic Non-ionic Non-ionic Non-ionic
HLB Range 2 – 16 ~2 – 4 ~2 – 10 ~1 – 3
Thermal Stability Excellent Good Good Excellent
Acid Stability Excellent Good Moderate Excellent
Water Solubility Dispersible Insoluble Dispersible Insoluble
Biodegradability Complete Complete Partial Complete
Primary Use W/O emulsifier, stabilizer, crystal modifier Bakery, dairy, margarine W/O emulsifier Chocolate, low-fat spreads
Cost Medium-High Low-Medium Medium Medium

SECTION 4: MECHANISM OF ACTION

Property Description
Emulsification Reduces interfacial tension between water and oil phases; Stabilizes water-in-oil (W/O) and oil-in-water (O/W) emulsions; Prevents coalescence and phase separation.
Dispersion Disperses solid particles in liquid media; Prevents sedimentation and agglomeration; Ensures homogeneous distribution.
Viscosity Control Modifies viscosity of emulsions; Lowers viscosity compared to other emulsifiers; Improves flow properties.
Crystal Modification Inhibits crystal formation and growth; Prevents fat bloom in chocolate and confectionery; Controls crystallization behavior of fats and oils.
Stabilization Stabilizes emulsions and dispersions; Prevents oil-water separation; Extends shelf life.
Foaming Control Modifies foam properties; Can act as defoamer or foam stabilizer; Used in various food applications.

SECTION 5: PRODUCTION PROCESS

Industrial Production Method (Two-Step Synthesis):

Step 1: Polyglycerol Production

Process: Glycerol + Alkaline Catalyst (NaOH, KOH) → Condensation (200-300°C) → CO₂ Purge (water removal) → Distillation → Polyglycerol

Description: Refined glycerol is heated in the presence of a small amount of alkaline catalyst at 200-300°C; The condensation reaction proceeds with water removal; CO₂ gas is used to remove generated water; Unreacted glycerol is distilled off; The product is cooled under nitrogen protection.

Step 2: Esterification

Reaction: Polyglycerol + Fatty Acid (Stearic Acid, etc.) → Polyglycerol Fatty Acid Ester + Water

Description: Polyglycerol and fatty acid are mixed and stirred; Esterification reaction proceeds at 220-230°C for approximately 2 hours; Reaction mixture is cooled in CO₂ gas flow; Unreacted polyglycerol is separated; Final product is obtained.

SECTION 6: FUNCTIONAL PROPERTIES

Property Description
Emulsifier (W/O) Water-in-oil emulsifier; Stabilizes emulsions in margarine, butter, spreads; Prevents oil-water separation; Improves texture and spreadability.
Emulsifier (O/W) Oil-in-water emulsifier; Stabilizes emulsions in ice cream, beverages; Forms fine pore structure; Improves creaminess and stability.
Dispersant Disperses fats and oils in formulations; Prevents separation; Ensures homogeneous mixing.
Crystal Modifier Inhibits crystal formation; Prevents fat bloom in chocolate; Controls crystallization in fats and oils; Improves product appearance and shelf life.
Viscosity Reducer Lowers viscosity of chocolate and other fat-based systems; Reduces plastic viscosity; Improves flow properties.
Stabilizer Stabilizes emulsions and dispersions; Prevents separation; Extends shelf life.
Texturizer Improves texture of food products; Provides creaminess and smoothness; Enhances mouthfeel.
Defoamer Controls foam in certain applications; Prevents excessive foam formation.

SECTION 7: MAIN APPLICATION AREAS

Industry / Application Function Typical Use
Ice Cream & Frozen Desserts Emulsifier, stabilizer, texturizer Creates fine pore structure; High overrun; Delicate, smooth taste; Prevents melting; Dosage: 1-10 g/kg.
Chocolate & Confectionery Viscosity reducer, crystal modifier Reduces viscosity; Prevents fat bloom; Improves flow properties; More effective than soy lecithin in reducing viscosity; Dosage: 0.1-1.0%.
Margarine & Shortening Emulsifier, stabilizer Prevents oil-water separation; Improves spreadability; Crystal modifier; Dosage: 5 g/kg max.
Bakery Products Emulsifier, quality improver Cake pre-mixed powders; Bread, cakes, pastries; Improves texture and volume; Anti-staling agent; Dosage: 0.1 g/kg.
Beverages Emulsifier, stabilizer Fat-containing and protein-containing beverages; Prevents stratification; Extends shelf life; Vegetable oil turbidity inhibitor.
Dairy Products Emulsifier, stabilizer Yogurt, sour cream, acidic dairy drinks; Stable under acidic conditions; Improves solubility; Prevents separation.
Meat Products Emulsifier, stabilizer Sausages, lunch meat, meatballs, fish fillings; Prevents starch retrogradation; Dispersion of fats; Moisture retention; Prevents shrinkage/hardening.
Candy & Confectionery Emulsifier, anti-stick Candies, jellies; Prevents cream separation; Anti-stick properties; Improves taste.
Pharmaceutical Emulsifier, stabilizer Ointments, creams, oral formulations; Stabilizes emulsions; Improves absorption.
Cosmetics Emulsifier, skin conditioner Creams, lotions, makeup; Stabilizes emulsions; Provides smooth texture.

SECTION 8: SAMPLE FORMULATIONS

Ice Cream Stabilizer/Emulsifier Blend:

Component Amount
Polyglycerol Fatty Acid Ester (PGE) 1 – 10 g
Ice Cream Base (Milk, Cream, Sugar) To 1000 g
Other Stabilizers (Guar Gum, Xanthan) As required

Instructions: Add PGE to the ice cream mix during blending; Homogenize; Pasteurize; Freeze in ice cream machine.

Chocolate Viscosity Reducer:

Component Amount
Polyglycerol Fatty Acid Ester (PGE) 0.1 – 1.0%
Chocolate Mass To 100%
Lecithin (optional) As required

Instructions: Add PGE during conching process; Reduces plastic viscosity; Prevents fat bloom.

SECTION 9: QUALITY SPECIFICATIONS

Parameter Food Grade (E475) Pharmaceutical Grade Cosmetic Grade Test Method
Appearance Yellow to brown liquid/solid Light yellow to brown Light yellow to brown Visual
Assay (PGE) ≥ 98.0% ≥ 99.0% ≥ 98.0% HPLC / Gravimetric
Acid Value ≤ 5.0 mg KOH/g ≤ 3.0 mg KOH/g ≤ 5.0 mg KOH/g Titrimetric
Saponification Value Variable (specified) Variable (specified) Variable (specified) Titrimetric
Hydroxyl Value Variable (specified) Variable (specified) Variable (specified) Titrimetric
HLB Value 2 – 16 (specified) Specified Specified
Loss on Drying ≤ 0.5% ≤ 0.5% ≤ 0.5% Gravimetric
Heavy Metals (as Pb) ≤ 10 ppm ≤ 5 ppm ≤ 10 ppm AAS / ICP
Arsenic (As) ≤ 2 ppm ≤ 1 ppm ≤ 2 ppm AAS / ICP
Lead (Pb) ≤ 2 ppm ≤ 1 ppm ≤ 2 ppm AAS / ICP

SECTION 10: TOXICOLOGICAL PROFILE

Parameter Value
Acute Oral Toxicity (LD50, Rat) > 5,000 mg/kg (low toxicity)
Acute Dermal Toxicity Low toxicity; Non-irritating
Skin Irritation Non-irritating
Eye Irritation Mildly irritating
Chronic Toxicity Low toxicity; No adverse effects at tested doses up to 9,000 mg/kg
Carcinogenicity Not classified as carcinogenic
Mutagenicity Not genotoxic
Reproductive Toxicity No reproductive toxicity observed
Allergenicity Low allergenicity
Acceptable Daily Intake (ADI) 25 mg/kg body weight (FAO/WHO, 2001; applicable to average bond length less than three glycerol units)
Special Toxicity Note EFSA (2017) re-evaluated safety and concluded no ADI required; Almost completely hydrolyzed into polyglycerol and fatty acids in the gastrointestinal tract; No adverse reactions found in existing studies; No genetic or reproductive toxicity observed; Safe for food use (FDA, § 172.854, 2000).

SECTION 11: GHS CLASSIFICATION AND LABELING

GHS Classification (in accordance with CLP and UN GHS):

Hazard Class Category H-Statement
Not classified as hazardous according to CLP criteria

Signal Word: None (Not classified as hazardous)

Hazard Pictograms: None

NFPA 704 Hazard Classification:

Health Flammability Reactivity Special
0 1 0 -
(Minimal health hazard) (Combustible) (Stable) (None)

SECTION 12: PRECAUTIONARY STATEMENTS (P-CODES)

Code Statement
P264 Wash hands thoroughly after handling
P280 Wear protective gloves/protective clothing/eye protection/face protection
P302+P352 IF ON SKIN: Wash with plenty of soap and water
P305+P351+P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses if present and continue rinsing
P332+P313 If skin irritation occurs: Get medical advice/attention
P337+P313 If eye irritation persists: Get medical advice/attention
P362+P364 Take off contaminated clothing and wash it before reuse
P403+P233 Store in a well-ventilated place. Keep container tightly closed
P501 Dispose of contents/container in accordance with local/regional/national/international regulations

SECTION 13: FIRST AID MEASURES

Exposure Route Action to Take
Inhalation Remove to fresh air. If respiratory irritation develops, seek medical attention (unlikely due to low volatility).
Skin Contact Wash with plenty of soap and water. Remove contaminated clothing. If irritation persists, get medical attention.
Eye Contact Rinse immediately with plenty of water for at least 15 minutes. Keep eyelids open. Remove contact lenses if present. If irritation persists, seek medical attention.
Ingestion Rinse mouth. Drink plenty of water. Seek medical attention if large quantities are ingested or if feeling unwell.

SECTION 14: FIREFIGHTING MEASURES

Parameter Information
Fire Hazard Combustible organic material. May burn with thick smoke.
Hazards Arising from Fire Thermal decomposition produces carbon monoxide, carbon dioxide, and irritating fumes.
Suitable Extinguishing Media Water spray, CO₂, dry chemical powder, foam.
Unsuitable Extinguishing Media Water jet (may spread burning material)
Special Protective Equipment Self-contained breathing apparatus (SCBA), full protective clothing.
Special Precautions Prevent material from entering sewers and waterways. Use protective equipment.

SECTION 15: STORAGE AND SHELF LIFE

Parameter Information
Storage Conditions Store in a cool, dry, well-ventilated area; PROTECT FROM LIGHT and HEAT; Keep away from direct sunlight and high temperatures.
Container Requirements Tightly closed containers (HDPE, PET, stainless steel, coated drums).
Materials to Protect From Light, heat, strong oxidizing agents, moisture
Shelf Life 24 – 36 months (in unopened original packaging, under proper storage conditions).
Stability Note Stable under recommended storage conditions; Good thermal stability; Stable under acidic conditions; Not easily hydrolyzed; May thicken at low temperatures (reversible).
Special Storage Requirements Store in a dark, cool, dry place; Avoid exposure to air and light; Opened containers must be resealed immediately; Keep away from sources of ignition.

SECTION 16: PACKAGING OPTIONS

Packaging Type Quantity Material
Plastic Canister 5 L, 10 L, 20 L HDPE / PET (chemical-resistant)
Plastic Drum 25 kg, 50 kg, 100 kg HDPE / Polypropylene (sealed)
Steel Drum 50 kg, 100 kg, 200 kg Stainless steel or lined steel drum
Composite Container 25 kg, 50 kg PE-lined composite drum
IBC Container 500 L, 1000 L HDPE or stainless steel IBC

SECTION 17: TRANSPORT INFORMATION

Parameter Information
UN Number Not regulated (non-hazardous)
Hazard Class Not applicable
Packing Group Not applicable
ADR/RID Not regulated
IMDG Code Not regulated (non-hazardous)
IATA (Air) Not regulated (non-hazardous)
Marine Pollutant No
Transport Temperature Ambient temperature; Protect from moisture and extreme temperatures.

SECTION 18: REGULATORY STATUS

Region / Authority Status
European Union Food additive E475 approved by EFSA; ADI: 25 mg/kg (FAO/WHO); No ADI required (2017 EFSA re-evaluation).
USA (TSCA) Listed (TSCA Inventory)
USA (FDA) GRAS (Generally Recognized as Safe); Food additive; 21 CFR 172.854
Turkey Food additive E475; Ministry of Agriculture approval required; Approved for use.
JECFA Approved; ADI: 25 mg/kg body weight; Specifications included.
EFSA Re-evaluated (2017); No ADI required for current uses.
IARC Not classified (non-carcinogenic)
NTP Not listed
OSHA Not regulated as hazardous
California (Prop 65) Not listed
Halal Yes (with certification, from halal sources)
Kosher Yes (with certification)
Vegan Yes (from plant-based sources)

SECTION 19: OTHER NAMES AND SYNONYMS

Type Name
Turkish Names Poligliserol Yağ Asidi Esterleri, Poligliserol Ester, PGE, E475
English Names Polyglycerol Fatty Acid Ester, Polyglycerol Esters of Fatty Acids, PGE, Polyglycerol Ester, Polyaldo, Decaglyceryl Dipalmitate
E Number E475
CAS Number 67784-82-1
EC Number 211-708-6
HS Code 3824.99
Synonyms Polyglycerol esters, Polyglycerol fatty acid ester, PGE, Polyglycerol ester of fatty acids, Decaglyceryl dipalmitate, Polyaldo

SECTION 20: SUMMARY TABLE

Parameter Value
Product Polyglycerol Fatty Acid Ester (PGE - E475)
CAS Number 67784-82-1
E Number E475
Molecular Formula (C₃H₈O₃) (variable, polymer)
Appearance Light yellow to amber liquid; Light brown to brown solid/wax
HLB Range 2 – 16
Solubility Insoluble in water; Soluble in ethanol, oils, and organic solvents
Primary Function Emulsifier, stabilizer, dispersant, thickener, defoamer, crystal modifier
Main Application Areas Food (ice cream, chocolate, bakery, margarine, beverages, meat), cosmetics, pharmaceuticals
Shelf Life 24 – 36 months
GHS Signal Word None (Not classified as hazardous)
UN Number Not regulated
Special Properties Non-ionic emulsifier; Good thermal and acid stability; Not easily hydrolyzed; Completely biodegradable; HLB 2-16; ADI 25 mg/kg; Vegan and Halal certified.

SECTION 21: CRITICAL WARNINGS AND BEST PRACTICES

CRITICAL WARNINGS:

  • GRAS Status: FDA approved (21 CFR 172.854); EFSA approved (E475); Safe for food use.

  • Safe: Low toxicity; Non-irritating to skin; Completely biodegradable.

  • Versatile: HLB ranges from 2-16; Can be hydrophilic or lipophilic depending on composition.

  • Excellent Stability: Good thermal stability; Stable under acidic conditions; Not easily hydrolyzed.

  • Crystal Modification: Inhibits crystal formation; Prevents fat bloom in chocolate.

  • Viscosity Reducer: More effective than soy lecithin in reducing viscosity in chocolate.

  • No ADI Required (EFSA 2017): Re-evaluated and considered safe at current usage levels.

  • Natural Source: Derived from vegetable oils and glycerol; Suitable for vegan and halal applications (with certification).

BEST PRACTICE RECOMMENDATIONS:

  • Ice Cream: Use as emulsifier and stabilizer; Dosage: 1-10 g/kg; Add during blending; Improves overrun, texture, and melt resistance; Creates fine pore structure.

  • Chocolate: Use as viscosity reducer and crystal modifier; Dosage: 0.1-1.0%; Add during conching; More effective than lecithin; Prevents fat bloom.

  • Margarine & Spreads: Use as W/O emulsifier; Dosage: 5 g/kg max; Prevents oil-water separation; Improves spreadability.

  • Beverages: Use as emulsifier and stabilizer; Dosage: 1-10 g/kg; Prevents stratification in protein/fat-containing beverages; Extends shelf life.

  • Meat Products: Use as emulsifier; Dosage: 1-10 g/kg; Prevents starch retrogradation; Improves fat dispersion; Moisture retention.

  • Bakery: Use as quality improver; Dosage: 0.1 g/kg; Improves texture and volume; Anti-staling agent.

  • Handling: Use at room temperature; Warm gently if solidified; Use appropriate mixing systems for dispersion.

  • Personal Protective Equipment: Chemical-resistant gloves, safety goggles, protective clothing (minimal risk).

  • Hygiene: Wash hands after handling; Maintain good industrial hygiene.

  • Storage: Store in tightly closed containers; Store in cool, dry, well-ventilated area; Protect from light and heat; Avoid exposure to air and moisture; Opened containers must be resealed immediately; Shelf life: 24-36 months under proper conditions.

  • Spill Management: Absorb with inert material (sand, vermiculite); Contain and collect; Avoid entry into drains or waterways.

  • Disposal: Dispose of in accordance with local, regional, and national regulations; Non-hazardous waste; Can be incinerated or recycled.

DETECTION METHODS:

Method Description Advantages Disadvantages
HPLC Most common for food and pharmaceutical products High sensitivity, reliable High cost, requires expertise
GC-FID Fatty acid profile analysis Detects component fatty acids Complex sample preparation
FTIR Functional group identification Fast, non-destructive Requires reference spectra
TLC Fingerprinting method Rapid screening, low cost Semi-quantitative
Acid/Saponification Values Chemical characterization Simple, standard method Not specific to PGE

PGE (E475) vs ALTERNATIVES COMPARISON:

Product Chemical Name / E Code Application Strength Weakness Status
Polyglycerol Fatty Acid Ester (E475) Polyglycerol Esters of Fatty Acids Ice cream, chocolate, bakery, margarine Versatile, acid-stable, crystal modifier, HLB range 2-16 Higher cost Widely approved
Mono- & Diglycerides (E471) Glycerol fatty acid esters Bakery, dairy, margarine Low cost, versatile Limited HLB, lower stability Widely approved
Lecithin (E322) Phosphatidylcholine Chocolate, bakery, margarine Natural, widely available Soy allergy, moderate performance Widely approved
Sorbitan Esters (E491-495) Sorbitan esters Bakery, chocolate Good W/O emulsifier Digestion concerns Approved, restricted
PGPR (E476) Polyglycerol Polyricinoleate Chocolate, low-fat spreads Excellent viscosity reducer Limited use, higher cost Widely approved

LEGAL DISCLAIMER:
The information provided in this document is based on our current knowledge and experience and is presented in good faith. However, as all conditions of use are beyond our control, it does not constitute a binding specification or warranty. This Technical Data Sheet is for informational purposes only. Users are responsible for testing the suitability for their own applications and for complying with all local, regional, and national regulations. For complete safety, storage, use, handling, waste, and regulatory compliance information, please refer to the official Safety Data Sheet (SDS/MSDS) provided by the manufacturer/supplier.

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