ACGIH® is proud to announce its new status as a 501(c)(3) charitable scientific organization. ACGIH® was formerly a 501(c)(6) organization. This new status allows ACGIH® to accept tax-deductible donations that will be used to continue the important work of its scientific Committees. Donations are fully tax deductible as provided by law retroactive to the determination date – January 4, 2016. To donate today, click here. For more information on our 501(c)(3) status, click here.