热塑性聚氨酯 TPU塑胶粒的CAS号是多少?

热塑性聚氨酯 TPU塑胶粒的CAS号是多少?
SECTION 1.PRODUCT IDENTIFICATION
1) Product name TPE T50-65A
2) Chemical family Thermoplastic Polymer
3) Shipping name Plastic material
4) Chemical name Thermoplastic Polyurethane
SECTION 2.COMPOSITION AND INGREDIENT INFORMARION
Wt %
1)Thermoplastic polyurethane > 98
2) Others < 2
SECTION 3.PHYSICAL AND CHEMICAL PROPERTIES
1) Specific gravity 1.14 (H2O=1)
2) Percent Volatile < 0.3%
3) State and appearance pellet
4) Solubility in water % by WT < 0.001
5) Color All Colors
6) Odor Odorless
供应商是这样写的,但是没有CAS号,请帮忙Thermoplastic polyurethane 的CAS号是多少