- Character: soft and elastic white fiber, without color spot, stain and foreign body, odorless, tasteless.
- White degree: not be less than 80 degrees.
- Soluble in water:Residue is less than 0.5% in 100mL test solution.
- PH:Phenolphthalein indicator and bromocresol violet indicator do not show pink in 100mL test solution.
- Easy oxide:Adding potassium permanganate to 40mL test solution do not completely disappear the red color.
- Water absorption time: be sunk below the liquid level within 10S.
- Water quantity:Water absorption per gram sample do not be less than 23g.
- The soluble substance in ethers:Residue is less than 0.5% in 100 mL test solution.
- Fluorescent material:no blue fluorescence can be observed.
- Dry weight loss:2g was dried to constant weight, and the weight loss do not exceed 8.0%.
- Burning residue:2g was dried to a constant weight, and the residual residue in the test product do not be more than 0.5%.
- Surface active substance:The surface active substance foam in the test solution do not exceed 2mm.
- Sterile:Medical cotton products supplied aseptically undergo an approved sterilization process.


