Unfortunately, this product is not currently offered in package sizes of less than 100mL. While not anhydrous, there are two analytical standards that are available in smaller sizes. Please see the links below to review these product options:
PHR1313-1G
https://www.sigmaaldrich.com/product/sial/phr1313
95670-5ML
https://www.sigmaaldrich.com/US/en/product/sial/95670