ppb means parts per billion in FDA
Similar to ppb
ACRA - Associate Commissioner for Regulatory AffairsACS - Automated Commercial System
ACS (CBER) - Analytical Chemistry Staff CBER
ACS (CDER) - Advisors and Consultants Staff CDER
ACSM - American College of Sports Medicine
ACT - AIDS Clinical Trials
ACT - Applied Clinical Trials
View all in FDA