The phrase "before the first use" is correct and can be used in written English.
It refers to something that happens or should be done before using something for the first time. Example: "Please read the instructions carefully before the first use of this product." In this sentence, "before the first use" indicates that the instructions should be read before using the product for the first time.
The characterization of expenditures as grass roots lobbying expenditures under paragraph (b)(2)(v)(C) shall apply only to expenditures paid less than six months before the first use of the advocacy communications or research materials with a direct encouragement to action.
The headphones have an internal lithium-ion battery that needs to be charged before the first use.
Before the first use, the bioreactor was washed for 2 h by passing through working buffer.
The key idea is that they need to get accustomed to the robot commands, before the first use in clinic.
Measurements are scheduled immediately before the first use of the system, immediately after and at three month follow-up.
Before the first use, the traps should be conditioned to remove possible impurities from packing, transport, and storage.
(AP) — Nebraska carried out its first execution in more than two decades on Tuesday with a drug combination never tried before, including the first use of the powerful opioid fentanyl in a lethal injection.
But before that, the first use of the API will be with the soon-to-be-released Wolfram Alpha iPhone app.
The sonata in all its manifestations has roots that go back long before the first uses of the actual name.
Don't just sling new jeans in the laundry with everything else: wear them for about 10 days before the first wash; use a cold-water cycle; do not use fabric conditioner and do not tumble dry.
Before the first practical use of the whole classifier, individual function blocks as well as their cascade connection must be tested.
