any idea where to buy this red food dye (powder)

Thank you all! We found it in a food supply store (the type that sells ingredients, spices, mixes etc to stores and food places) and the person from the company had also replied saying they can be purchased in SSiong as most of you kindly pointed out. Thank you!

My grandma bought from provision shop at wet market

Provision shop, Prime and Giant supermarket

I've seen this in sheng shiong

Giant, sheng shiong have those

Sheng Siong.

Sheng shiong confirm have

Saw it in sheng shiong

Giant shengsheong

Try sheng shiong