The standard physical and chemical properties of industrial grade cellulose acetate (2-CA) white powder are practical and can be directly used in technical parameter tables SDS、 Procurement specifications and production processes.

1、 Basic Information

Chinese name: Cellulose Diacetate

English name: Cellulose Diacetate, CDA

CAS number: 9004-35-7

Appearance: White or slightly yellow free flowing powder

Odor: Odorless

Flammability: Flammable, non self igniting

Biodegradability: Biodegradable, environmentally friendly

2、 Key chemical indicators

1. Substitution degree DS

2.20-2.50 (commonly used for board grade 2.40-2.50)

2. Combined with acetic acid content

54.0%～56.5%

3. Free acidity (calculated as acetic acid)

≤0.05%～0.10%

4. Moisture

≤2.0%～3.0%

5. Ash content

≤0.1%～0.2%

6. Iron content

≤ 3-5 ppm (lower requirement for transparent boards)

3、 Physical properties

1. Particle size

Commonly used: 100-250 μ m

Mesh size: approximately 60-150 mesh

2. Bulk density

0.30～0.55 g/cm³

3. True density

1.30～1.32 g/cm³

4. Melting point/softening point

No obvious melting point

Thermal softening: 160-180 ℃

5. Thermal decomposition temperature

About 230-300 ℃

6. Glass transition temperature Tg

About 180 ℃ (unplasticized)

4、 Solubility

Easy to dissolve: acetone, ethyl acetate, dichloromethane, chloroform, nitroethane

Partial dissolution: ethanol, methanol (often requiring mixed solvents)

Insoluble: water, fatty hydrocarbons, cyclohexane, ether

The solution is generally colorless, transparent, and highly viscous.

5、 Mechanical and processing related

Tensile strength: High viscosity powder can reach 40-70 MPa after molding

Resilience: Excellent, not easily brittle or cracked

Moisture absorption: moderate, with slight changes in size after moisture absorption

Weather resistance: Generally, UV resistant agent needs to be added

Oil resistance: good

Acid and alkali resistance: resistant to weak acids and bases; Not resistant to strong acids and alkalis

6、 Security brief

Skin/Eye Irritation: Low

Inhalation of dust: Long term inhalation in large quantities may irritate the respiratory tract

Belonging to ordinary chemicals, non hazardous chemicals.