White or yellowish powder . Choice diversity :customer can choose different foaming effect product according to his actual needs . Other use :Has following advantages if used in PVC air blowing slippers production :less adding amount ,can make PVC air blowing slippers very light ,small density ,so that bubbles in the final product are fine ,smooth and well proportioned .after the product achieve final form,its surface is bright and glossy and the color is deep and fresh . it doesn't shrink too much , it is easy to use ,add to your formulation, mix to the regular state ,control the temperature.it doesn't require changing your technology .the adding amount depends on your productivity and foaming effect concerning chemicals you use . usually it is about 0.3%-2% -1%-4%.