Like I thought... Kodak used to make a similar paper.
It is panchromatic, so no safelight is safe with this one.
When they say not to process in B&W chemicals, I think it either won't do anything or the image won't be stable. But if you plan on using it as a paper negative, it might just be what you're looking for. Here's what I found:
Standard RA4 color paper processed in B&W chems will give a low contrast
image. The chems should be in the area of 80 to 100 degrees F. The paper
will have to be handled in total darkness.