Diethylene Glycol, Ethylene Glycol, Ethylene Diglycol, Diglycol, DEG, 111-46-6

Diethylene Glycol, Ethylene Diglycol, Diglycol, DEG, 111-46-6

TECHNICAL DATA SHEET (TDS)

1. PRODUCT IDENTIFICATION AND DESCRIPTION

Diethylene Glycol is a co-product of ethylene glycol manufacture or produced via ethylene oxide hydration. It is a clear, colorless, practically odorless, and hygroscopic liquid. Due to its molecular structure, it possesses a higher boiling point and significantly higher viscosity compared to Monoethylene Glycol (MEG).

2. PHYSICAL AND CHEMICAL PROPERTIES (SPECIFICATIONS)

Technical Correction Note: The source text described DEG as having "low viscosity." This is technically inaccurate for industrial applications. DEG has medium-to-high viscosity relative to water and standard solvents. The table below reflects accurate physical constants.

3. CHEMICAL STABILITY AND REACTIVITY

The product is stable under normal storage conditions but is incompatible with the following materials.

4. MAJOR APPLICATIONS AND FUNCTIONAL USE

DEG's high boiling point and humectant properties make it essential for the following industrial processes.

5. SAFETY INFORMATION (SUMMARY)

Critical Warning: This compound is toxic if ingested and must never be used in products intended for human or animal consumption.

6. STORAGE AND HANDLING

7. REGULATORY INFORMATION AND LABELING

• Classification (GHS / CLP):

  • H302: Harmful if swallowed.

  • H373: May cause damage to organs (Kidneys) through prolonged or repeated exposure.

• Signal Word: Warning

• Pictograms: GHS07 (Exclamation Mark), GHS08 (Health Hazard)

8. ADDITIONAL NOTES AND CORRECTIONS

Based on the detailed review of the provided source text, the following technical adjustments have been made in this official TDS:

1. Viscosity Correction: The source text description "Low viscosity" has been corrected. DEG is a viscous liquid (approx. 36 cP at 20°C), which is more than twice as viscous as Ethylene Glycol (MEG) and significantly thicker than water.

2. Sweet Taste Warning: The source lists "Sweet taste" as a property. While technically true, this is a severe safety hazard as it can lead to accidental ingestion by children or animals. This TDS explicitly links this property to a strict prohibition on food use.

3. Reactivity Specifics: The specific temperature for exothermic reaction with Sodium Hydroxide (446°F / 230°C) has been retained as it is a valid, specific process safety data point for high-temperature operations.

9. SECTORAL SUITABILITY AND COMPLIANCE

(Sektörel Uygunluk ve Mevzuat Durumu)

This section clarifies which industries can legally and technically utilize Diethylene Glycol and under what restrictions.

10. FORMULATION GUIDELINES & USAGE RECIPES

(Kullanım Reçeteleri ve Formülasyon Örnekleri)

Disclaimer: These are representative starting point formulations for industrial applications. Exact ratios depend on specific grade of raw materials and desired end-product properties.

10.1. Textile Printing Paste (Humectant Recipe)

Objective: Prevent screen clogging and dye drying during rotary printing.

10.2. Industrial Hard Surface Cleaner (Low Foam)

Objective: Degreasing metal parts with low volatility.

10.3. Aircraft De-icing Fluid (Type I Fluid Base)

Objective: Freezing point depression and surface wetting.

11. NOMENCLATURE AND ALTERNATIVE GRADES

(Diğer İsimler, Eş Anlamlılar ve Alternatif Kimyasallar)

This table distinguishes between Synonyms (same chemical) and Alternatives (different chemicals used for the same function).

12. TECHNICAL RECOMMENDATIONS AND BEST PRACTICES

(Teknik Tavsiyeler ve En İyi Uygulamalar)

Based on the analysis of the provided physical properties, the following operational recommendations are made:

1. Temperature Management for Pumping:

• Issue: DEG has a viscosity of ~36 cP at 20°C and a freezing point of -10°C.

• Recommendation: In cold climates, storage tanks and transfer lines MUST be heat traced and insulated to maintain a minimum temperature of 15-20°C. Failure to do so results in cavitation of centrifugal pumps and incomplete tank drainage due to high wall adhesion.

2. Moisture Exclusion (Critical Quality Control):

• Issue: DEG is highly hygroscopic. If left open to atmosphere, it will absorb up to 30% of its weight in water, diluting the purity and reducing boiling point/efficiency.

• Recommendation: Always purge storage tanks with Dry Nitrogen (N₂) or install a Silica Gel Breather on the tank vent. Never use compressed air for transfer as it introduces ambient humidity.

3. Gasket and Seal Selection:

• Issue: DEG is a mild solvent for certain rubbers.

• Recommendation: Use EPDM (Ethylene Propylene Diene Monomer) or PTFE (Teflon) gaskets. Avoid Natural Rubber or Nitrile (Buna-N) unless specifically rated for glycol service, as swelling may occur over time.

4. Analytical Substitution Warning:

• Issue: The sweet taste and clear appearance lead to accidental substitution in small-scale manufacturing (e.g., mixing up Propylene Glycol drums with DEG drums).

• Recommendation: Drums must be clearly labeled and ideally color-coded (e.g., DEG: Orange stripe / PG: Green stripe). Store DEG in a physically segregated area from food-grade or cosmetic-grade raw materials to prevent cross-contamination.