27 CFR §22.107

1. (a)Pathological laboratories, not operated by a hospital or sanitarium, may withdraw and use tax-free alcohol if exclusively engaged in making analyses or tests for hospitals or sanitariums. If a pathological laboratory does not exclusively conduct analyses or tests for hospitals or sanitariums, it does not qualify for the permit issued under this part.
2. (b)A pathological laboratory which uses tax-free alcohol for any other purpose, except as provided in this section, shall become liable for the tax on the alcohol.
3. (c)Except as provided in § 22.102, the use of tax-free alcohol and of products resulting from the use of tax-free alcohol shall be confined strictly to the permit premises.