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.
Specific symptoms related to vitamin D deficiency include: 1  Muscle weakness. 2  Joint aches and discomfort. 3  High blood pressure. 4  Inability to concentrate or focus. 5  Urinary incontinence, bladder issues. 6  Constipation. 7  Headaches. 8  Cold/flu, immune system decline. 9  Mood disorders.