Why is NyGuard™ EZ1 clear but NyGuard® IGR concentrate has a slight yellow color

NyGuard EZ1 is a different diluted formula from NyGuard IGR concentrate enabling it to be easily mixed using the 1 oz. bottle.  Because the active ingredient is a lower percentage in NyGuard EZ1, the product is clear.  The higher amount of active ingredient in the NyGuard concentrate produces a slight yellowish color to that product.  Both NyGuard EZ1 and NyGuard IGR concentrate are labeled for control of the same pests and use sites.