Higher Adsorption Vaccine Adjuvants

Our VAC 20 HA grade has a 2% assay Al2O3%. SPI can customize the assay level with this improved adsorption capacity. This new grade is validated at our facility in France, which is FDA and ANSM approved.

Innovation With VAC 20 HA

Continuing its focus on innovation, we have developed a high protein adsorption grade of vaccine adjuvant.


VAC 20 HA has 50% more adsorption capacity than the standard VAC 20 grade.

Langmuir Adsorption Isotherm

Langmuir Adsorption Isotherm

VAC 20 HA stays within range of physiological pH.

VAC 20 HA stays within range of physiological pH.

VAC 20 HA has a finer particle size that reduces inflammation at the point of injection. The finer PSD means more surface area for more adsorption capacity.


VAC 20 HA grade is just one example of SPI Pharma’s ability to customize our VAC grades.

Related Product Information

Related Applications

Vaccine Adjuvants

SPI Pharma supplies aluminum hydroxide vaccine adjuvants to enhance and help the ability of your antigen to stimulate the immune system.

Safety Data Sheet

Contact our Experts Today

Learn how SPI Pharma and Q-Vant can enhance access to Saponin based Adjuvants and enhance your vaccine development.  Contact us to discuss your developments with our experts