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Send EmailCyclic Phosphonate Ester, Organophosphorus Flame Retardant, 170836-68-7
| Parameter | Value |
|---|---|
| Product Name | Cyclic Phosphonate Ester |
| Chemical Type | Organophosphorus Flame Retardant |
| CAS Number | 170836-68-7 (mixture) |
| Component 1 | (5-Ethyl-2-methyl-2-oxido-1,3,2-dioxaphosphorinan-5-yl)methyl methylphosphonate (CAS 41203-81-0) |
| Component 2 | Bis[(5-ethyl-2-methyl-2-oxido-1,3,2-dioxaphosphorinan-5-yl)methyl] methylphosphonate (CAS 42595-45-9) |
| Molecular Formula | C₂₄H₅₁O₁₅P₅ (for the mixture) |
| Molecular Weight | 734.5 g/mol |
| Appearance | Colorless to light yellow, slightly hazy viscous liquid |
| Origin | Synthetic |
| Application | Flame retardant for textiles (polyester, polycotton) and PU back-coating |
| Parameter | Description |
|---|---|
| Chemical Name | Cyclic Phosphonate Ester (mixture) |
| Other Names | Antiblaze CU/CT, Hopeflam CT, CU |
| CAS Number | 170836-68-7 (mixture of two components) |
| EC Number | No single EC number because it is a mixture |
| Molecular Formula | C₂₄H₅₁O₁₅P₅ |
| Molecular Weight | 734.5 g/mol |
| Chemical Class | Organophosphorus compound (cyclic phosphonate ester) |
| Appearance | Colorless to light yellow viscous liquid |
| Odor | Not specified |
| Origin | Synthetic |
| Application | Textile flame retardant, PU back-coating |
Description:
Cyclic Phosphonate Ester is a highly efficient phosphorus-based flame retardant designed for textile applications. The product exhibits high phosphorus content, excellent water solubility, and non-corrosive characteristics. It is particularly suitable for durable flame-retardant finishing of polyester and polyester/cotton blended fabrics. The product can also be utilized in polyurethane (PU) back-coating systems where enhanced flame-retardant performance is required. Different grades are available to meet various processing requirements and active content levels. CAS 170836-68-7 technically refers to a mixture of two cyclic phosphorus esters.
| Property | Grade A | Grade B |
|---|---|---|
| Active Component (%) | 100 | 93 |
| Phosphorus Content (%) | ≥ 20 | ≥ 20 |
| pH Value | 2.0 – 3.0 | 2.0 – 3.0 |
| Density (g/cm³ @ 25°C) | 1.2 – 1.3 | 1.2 – 1.3 |
| Viscosity (cPs @ 20°C) | 20,000 – 50,000 | 2,000 – 10,000 |
| Acid Number (mg KOH/g) | ≤ 30 | ≤ 20 |
| Property | Description |
|---|---|
| Appearance | Clear to slightly hazy viscous liquid |
| Color | Colorless to light yellow |
| Solubility | Completely soluble in water |
Note: Values are typical and may vary by source and production batch.
| Solvent | Solubility | Conditions |
|---|---|---|
| Water | Completely soluble | - |
| Organic Solvents | Data not found | - |
Note: The product is stated to be completely soluble in water. Solubility data in organic solvents are not provided in the sources.
| Property | Description |
|---|---|
| Chemical Class | Organophosphorus compound (cyclic phosphonate ester) |
| Unique Structure | Cyclic phosphonate ester structure; high phosphorus content |
| Acid-Base Properties | Acidic (pH 2.0 – 3.0) |
| Chemical Stability | Stable under normal conditions |
| Thermal Stability | > 200°C (decomposition temperature) |
| Hydrolytic Stability | Soluble in water; hydrolytic stability data limited |
| Oxidizing Agents | Avoid contact with strong oxidizing agents |
Strong oxidizing agents
Strong bases (care should be taken for pH adjustment)
Flame Retardancy Mechanism: Decomposes under heat to form phosphoric acid; this acid catalyzes char formation on the polymer surface and creates a protective barrier. It also interrupts the flame chain reaction by releasing phosphorus radicals in the gas phase.
| Parameter | Specification |
|---|---|
| Active Component (%) | 100 (Grade A); 93 (Grade B) |
| Phosphorus Content (%) | ≥ 20 |
| pH Value | 2.0 – 3.0 |
| Density (25°C) | 1.2 – 1.3 g/cm³ |
| Viscosity (20°C) | 20,000 – 50,000 cPs (Grade A); 2,000 – 10,000 cPs (Grade B) |
| Acid Number | ≤ 30 mg KOH/g (Grade A); ≤ 20 mg KOH/g (Grade B) |
| CAS Number | 170836-68-7 (mixture) |
| Molecular Formula | C₂₄H₅₁O₁₅P₅ |
| Molecular Weight | 734.5 g/mol |
| Packaging Type | Weight |
|---|---|
| Plastic Drum | 125 kg |
| IBC Container | 1,250 kg |
| Iron Drum | 250 kg (some suppliers) |
For Polyester and Polycotton Fabrics
| Component | Dosage |
|---|---|
| Cyclic Phosphonate Ester | 6 – 15 kg |
| Water | 20 kg |
| 20% Na₂HPO₄ Solution, Na₂CO₃ or 25% Ammonia | 4 – 8 kg |
| Penetrating Agent | 0.05 – 0.20 kg |
| Additional Water | Dilute to 100 kg total bath |
Application Procedure:
Add water to the mixing vessel.
Add Cyclic Phosphonate Ester under stirring.
Adjust pH to 5.5 – 6.5 using sodium phosphate solution, sodium carbonate, or ammonia.
Add the penetrating agent and mix thoroughly.
Dilute with water to a total bath weight of 100 kg.
Apply using conventional padding and curing processes.
Durable flame-retardant finishing of polyester fabrics.
Durable flame-retardant finishing of polyester/cotton blended fabrics.
PU back-coating applications.
Textile finishing systems requiring enhanced flame resistance.
Industrial textile processing and technical textiles.
High phosphorus content.
Excellent flame-retardant efficiency.
Outstanding water solubility.
Non-corrosive formulation.
Easy application in textile finishing processes.
Good compatibility with conventional auxiliaries.
Suitable for durable flame-retardant finishes.
Durability to more than 50 washes (technical product data).
| Property | Description |
|---|---|
| Essentiality | Not applicable |
| Synthesis | Not applicable |
| Unique Structure | Not applicable |
| Protein Structure | Not applicable |
| Primary Function | Not applicable |
| Physiological Role | Not applicable |
Note: This product is an industrial textile chemical. It is not intended for biological, pharmaceutical, or food applications.
| Application | Description |
|---|---|
| Cell Culture | Not applicable |
| Protein Research | Not applicable |
| Metabolomics | Not applicable |
| Microbiology | Not applicable |
Note: Not applicable for this industrial textile chemical.
| Parameter | Value |
|---|---|
| Oral LD₅₀ (rat) | 1,383 – 1,854 mg/kg |
| Dermal LD₅₀ (rat) | > 2,000 mg/kg |
| Inhalation LC₅₀ (rat, 4 hours) | > 15.57 mg/L (dust/mist) |
| Skin Irritation | Causes skin irritation (H315) |
| Eye Irritation | Causes serious eye irritation (H319) |
| Skin Sensitization | Sensitizing (Buehler test positive) |
| Endpoint | Classification |
|---|---|
| Carcinogenicity | Not classified (not listed by IARC, NTP, OSHA) |
| Mutagenicity | Negative (Ames test and chromosome aberration test) |
| Reproductive Toxicity | Not classified (no data) |
| STOT – Repeated Exposure | Not classified (NOAEL: 25 mg/kg/day, oral, rat) |
| Classification | Category | Hazard Statement |
|---|---|---|
| Skin Irritation | Skin Irrit. 2 | H315 – Causes skin irritation |
| Eye Irritation | Eye Irrit. 2 | H319 – Causes serious eye irritation |
| Skin Sensitization | Skin Sens. 1 | H317 – May cause an allergic skin reaction |
| Signal Word | Warning | - |
| Pictograms | GHS07 (Exclamation mark) | - |
Note: GHS classification is based on the most common classifications in available SDSs. Some suppliers may use additional classifications.
| Code | Statement |
|---|---|
| P264 | Wash skin 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 easy to do. Continue rinsing. |
| P333+P313 | If skin irritation or rash 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. |
Hazards:
Causes skin irritation
Causes serious eye irritation
May cause an allergic skin reaction
PPE (recommended):
Chemical-resistant gloves
Safety goggles
Suitable work clothing
| Parameter | Value |
|---|---|
| Biodegradability | Not specified |
| Aquatic Toxicity (Fish, LC₅₀, 96h) | > 500 mg/L (Danio rerio) |
| Daphnia magna (EC₅₀, 48h) | 931 mg/L |
| Bioaccumulation | Low potential (log Pow: 0.73) |
| Ecotoxicity Classification | Not classified as hazardous to the aquatic environment |
| Parameter | Information |
|---|---|
| UN Number | Not regulated |
| Proper Shipping Name | Cyclic Phosphonate Ester |
| Hazard Class | Not classified as dangerous goods |
| Packing Group | Not applicable |
| Marine Pollutant | No |
| ADR/RID | Not classified |
| IMDG | Not classified |
| IATA | Not classified |
| HS Code | 3824.90 (for mixture) |
Note: Based on available data, the product is not classified as dangerous goods under transport regulations.
| Region / Standard | Status |
|---|---|
| EU (REACH) | Mixture components may be registered; no single registration for the mixture |
| USA (TSCA) | Components may be listed |
| Turkey (KKDİK) | Data not found |
| Pharmacopoeia | Not applicable |
| FDA | Not applicable |
Note: Since the product is a mixture, regulatory status depends on the registration status of the components (CAS 41203-81-0 and 42595-45-9).
| Parameter | Information |
|---|---|
| Storage Conditions | Store in tightly closed original containers in a cool, dry, and well-ventilated area. Protect from direct sunlight, heat sources, and moisture. |
| Container Requirements | Keep tightly closed in original packaging. |
| Materials to Avoid | Strong oxidizing agents. |
| Shelf Life | 12 months in unopened original packaging under recommended storage conditions. |
| Hygroscopicity | Not specified |
| Handling Notes | Use appropriate PPE. Follow local occupational health and safety regulations. |
| Packaging Options | 125 kg plastic drum, 1,250 kg IBC container. |
| Parameter | Information |
|---|---|
| Fire Hazard | Non-flammable liquid (product is designed as a flame retardant) |
| Extinguishing Media | Water spray, dry chemical, CO₂, alcohol-resistant foam |
| Special Hazards | Thermal decomposition may release phosphorus oxides and carbon oxides |
| Protective Equipment | Self-contained breathing apparatus (SCBA) and full protective clothing |
| Parameter | Information |
|---|---|
| Personal Protection | Use appropriate PPE (gloves, goggles, protective clothing) |
| Ventilation | Provide adequate ventilation |
| Control | Contain spill; prevent entry into waterways |
| Cleaning Methods | Absorb with inert material; place in appropriate disposal container |
| Environmental Precautions | Prevent entry into drains, sewers, and water bodies |
| Waste Disposal | Dispose of according to local regulations |
| Exposure Route | Action to Take |
|---|---|
| Inhalation | Move person to fresh air. If breathing is difficult, give oxygen. Seek medical attention. |
| Skin Contact | Wash with plenty of soap and water. Seek medical attention if irritation persists. |
| Eye Contact | Rinse immediately with plenty of water for at least 15 minutes (keeping eyelids open). Seek medical attention. |
| Ingestion | Rinse mouth with water. Do NOT induce vomiting. Drink plenty of water. Seek medical attention. |
| Raw Material | Description |
|---|---|
| Phosphoric Acid Derivatives | Main raw material |
| Organic Intermediates | For esterification reaction |
| Downstream Product | Application |
|---|---|
| Flame-Retardant Polyester Fabrics | Textiles (apparel, home textiles, technical textiles) |
| PU Back-Coated Fabrics | Industrial textiles |
| Sector | Application Area | Example Use | Suitability |
|---|---|---|---|
| Textiles | Flame-retardant finishing | Polyester and polycotton fabrics | High |
| Textiles | PU back-coating | Industrial coatings | High |
| Industrial Textiles | Technical textiles | Protective clothing, tarpaulins | High |
Not applicable. Cyclic Phosphonate Ester is an industrial textile chemical and is not used for CO₂ absorption or as a chemical reagent.
| Compound | Description | CAS Number |
|---|---|---|
| Component 1 | (5-Ethyl-2-methyl-2-oxido-1,3,2-dioxaphosphorinan-5-yl)methyl methylphosphonate | 41203-81-0 |
| Component 2 | Bis[(5-ethyl-2-methyl-2-oxido-1,3,2-dioxaphosphorinan-5-yl)methyl] methylphosphonate | 42595-45-9 |
Note: The commercial product (CAS 170836-68-7) is a mixture of these two components.
Cyclic Phosphonate Ester is a highly efficient phosphorus-based flame retardant designed for textile applications. The product exhibits high phosphorus content, excellent water solubility, and non-corrosive characteristics. It is particularly suitable for durable flame-retardant finishing of polyester and polyester/cotton blended fabrics. The product can also be utilized in polyurethane (PU) back-coating systems where enhanced flame-retardant performance is required. CAS 170836-68-7 technically refers to a mixture of two cyclic phosphorus esters (CAS 41203-81-0 and 42595-45-9).
| Property | Value |
|---|---|
| Appearance | Clear to slightly hazy viscous liquid |
| Chemical Type | Organophosphorus Flame Retardant |
| CAS Number | 170836-68-7 (mixture) |
| Molecular Formula | C₂₄H₅₁O₁₅P₅ |
| Molecular Weight | 734.5 g/mol |
| Phosphorus Content | ≥ 20 % |
| pH (solution) | 2.0 – 3.0 |
| Density (25°C) | 1.2 – 1.3 g/cm³ |
| Water Solubility | Completely soluble |
| Sector | Applications |
|---|---|
| Textiles | Flame-retardant finishing for polyester and polycotton fabrics |
| Textiles | PU back-coating applications |
| Industrial Textiles | Technical textiles |
SKIN IRRITATION: Causes skin irritation (H315).
EYE IRRITATION: Causes serious eye irritation (H319).
SENSITIZING: May cause an allergic skin reaction (H317).
PPE REQUIRED: Use chemical-resistant gloves, safety goggles, and suitable work clothing.
STORAGE: Store in a cool, dry, well-ventilated area, away from direct sunlight. Keep containers tightly closed.
DISPOSAL: Dispose of according to local regulations.
The product is a mixture of two different cyclic phosphonate esters (CAS 170836-68-7).
May cause skin and eye irritation; risk of allergic skin reaction.
This TDS contains complete toxicological, transport, firefighting, and first aid data, but always refer to the supplier's official SDS/MSDS.
Do not use this TDS as a substitute for the official SDS/MSDS.
Users are responsible for determining the suitability of the product for their specific applications and for complying with all applicable regulations and safety requirements.
Disclaimer:
This Technical Data Sheet (TDS) is for informational purposes only. The information provided is based on the original source document, verified CAS numbers, and data completed from reliable sources (ECHA, manufacturer SDSs). However, the user is solely responsible for determining the suitability of the product for their specific applications and for complying with all applicable regulations and safety requirements. For complete safety, handling, storage, and regulatory compliance information, always refer to the official Safety Data Sheet (SDS/MSDS) provided by the manufacturer/supplier. Users are responsible for testing the product in their own processes and applications. All local, national, and international regulations must be followed when working with Cyclic Phosphonate Ester.