The phrase "a special lab" is correct and usable in written English.
You can use it to refer to a laboratory that has unique features, purposes, or equipment that distinguishes it from regular labs.
Example: "The researchers conducted their experiments in a special lab designed for high-security projects."
Alternatives: "a unique laboratory" or "a designated lab".
Many have said that Apple or the FBI could protect the integrity of GovOS by maintaining a special lab specially designed to make sure no bad guys ever got access to GovOS.
The center devoted several years to constructing a special lab for Fouchier's research.
He takes me to a special lab where this procedure is carried out.
Later, an autopsy — her brain had to be shipped to a special lab — showed the cause of death to have been F.F.I.
This is where trouble cropped up: I.I.T. Rajasthan had not built a special lab for testing the tablets, although the funding was allocated for one, the government source says.
To investigate this the researchers used a special lab that reduced air pressure simulating cruising at 35,000 feet (10.6km) – as well as sucking moisture out of the air and simulating the engine noise.
Access to special labs or costly research equipment is no longer a barrier.
She had to go to special labs to get prints made, and the colors weren't always what she wanted.
Special lab-grades of PF were therefore developed.
For now, at least, smallpox lives on – somewhere deep inside two very special labs; the only two places left on Earth where one of history's biggest killers still thrives.
The medical center in Rotterdam built a special 1,000-square-foot 1,000-square-foot 1,000-square-footown place where people work in spacesuits in sealed chambers with filtered air and multiple precautions to keep germs in and intruders out and to protect the scientists from infection.
