Per 
Item #: SCP-4461
Object Class: Euclid
Special Containment Procedures: SCP-4461 is to be contained in a Sandia alloy plated container 2.5 by 2.5 meters, with a polyester bed and sheets included. Interior filtration and ventilation devices are to be inspected for any faults or damage on a weekly basis. Personnel entering SCP-4461's containment area and cell are to be fitted with a multiple layer Silicone-Butyl hazmat suit and Bromo-butyl gas mask. PPM detectors are to be posted in the surrounding containment in an area of 12 meters.
Description: SCP-4461 is humanoid in appearance, measuring approximately 170 cm. Tests show subjects skin to be a composition of arsenic and asbestos. SCP-4461 during daytime hours is relatively docile, only attacking when provoked. SCP-4461 is capable of speech, however, long and thoughtful conversations are confusing to SCP-4461. SCP-4461 will produce a colorless and extremely corrosive toxic gas from the hours of 2200 to 0900 that causes immediate 3rd degree chemical burns on skin contact and the breakdown of the lung tissue when inhaled.