NFPA-45 Fire Protection for Laboratories Using Chemicals is very clear that if you have an electrical outlet in a hood then you need another disconnect within 50 ft of the hood.
7.8.4.1 In installations where services and controls are within the hood, additional electrical disconnects shall be located within 15 m (50 ft) of the hood and shall be accessible and clearly marked.
7.8.4.2 If electrical receptacles are located external to the hood, no additional electrical disconnect shall be required.
The disconnect can be a switch, a circuit breaker, or even a plug. So a plug strip inside the hood plugged into an outlet outside the hood is legal.
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