Optical Brightener SWN also named Optical Brightener MDAC，it is a kind of optical brightener is a niche product，its melting point is abot 71℃ and mostly usde for  PVC plastics, wool, natural silk and acrylic, nylon (polyamide), and also used in the whitening of washing powder.

Structure type: Coumarins (C.I.140)

Appearance: white crystalline powder

Content: ≥ 99%

Melting point: 68-73 ℃

Moisture: ≤0.5%

Physical and chemical properties:

1 . This product has wide applicability, high whiteness, soluble in organic solvents such as ethanol, but insoluble in water;

2 . This product has the characteristics of compatibility and strong applicability.

Scope of application:

Mainly used in the whitening of soft and hard PVC plastics, wool, natural silk and acrylic, nylon (polyamide), and also used in the whitening of washing powder; this product is also a common laser dye.

Instructions：

1. Application to plastics: The amount of SWN/MDAC is generally 0.01-0.06%, and it can be mixed evenly   with the corresponding processed plastics.

2. When used for wool, natural silk and acrylic, it is generally used in liquid state:

   SWN/MDAC dosage: wool: 0.05-0.35%; 

                        natural silk: 0.05-0.4%; 

                         acrylic fiber: 0.05-0.8%

3. This product can also be added as a brightener to detergents and washing powders, with a dosage of 0.001-0.005%.

Packaging and storage：

25kg cardboard drum lined with plastic bag, storage period of one year under normal temperature and dry conditions.