Red phosphorus is used in safety matches, fireworks, smoke bombs and pesticides. Black phosphorus is also formed by heating white phosphorus, but a mercury catalyst and a seed crystal of black phosphorus are required. Black phosphorus is the least reactive form of phosphorus and has no significant commercial uses.hosphorus has three main allotropes: white, red and black. White phosphorus is poisonous and can spontaneously ignite when it comes in contact with air. For this reason, white phosphorus must be stored under water and is usually used to produce phosphorus compounds.
The classic symptoms of vitamin D deficiency is rickets in children and osteomalacia in adults. Rickets can cause skeletal deformities, such as thickened wrists and ankles. It can also cause muscle weakness and pain in the back, pelvis and legs. Osteomalacia is a bone condition that causes softened bones and an aching pain in the lower back, pelvis, hips and legs.
Yes, deficiency of vitamin D can cause bone pain and muscle weakness. However, mild vitamin D deficiency is not necessarily associated with any symptoms. Vitamin D has been referred to as the sunlight vitamin because it is made in our skin when we are exposed to sunlight. Read more about diagnosis, treatment, and risk factors of vitamin D deficiency Â».