메타인산

그림문자(GHS)

• 그림문자(GHS)

  

• 신호 어

  Danger

• 유해·위험 문구

  H314：피부에 심한 화상과 눈에 손상을 일으킴

• 예방조치문구

  P280：보호장갑/보호의/보안경/안면보호구를 착용하시오.

  P305+P351+P338：눈에 묻으면 몇 분간 물로 조심해서 씻으시오. 가능하면 콘택트렌즈를 제거하시오. 계속 씻으시오.

  P310：즉시 의료기관(의사)의 진찰을 받으시오. 삼켰다면 즉시 의료기관(의사)의 도움을 받으시오.

메타인산 화학적 특성, 용도, 생산

• 개요

  Metaphosphoric acid is a singularly anhydrous version of orthophosphoric acid and is sometimes used as a water- or moisture-absorbing reagent. Metaphosphoric acid has phosphorus in the formal oxidation state of ＋5. Although it has several CAS numbers: 10343-62-1, 135306-83-1, 13566-25-1, and 37267-86-0, only the last two are associated with the IUPAC name “phosphenic acid”.
  Metaphosphoric acid units can be bonded together in rings (cyclic structures), chains (catena), or branched by condensation yielding water as each acid unit is added. These structures consist of linked metaphosphoric acid molecules. For example, trimetaphosphoric acid is the simplest cyclophosphoric acid. Metaphosphoric acid would need to share the doubly bonded oxygen with neighboring phosphorus atoms to form polymers itself. Many oligamers are possible with the alkaline earths but the trimetaphosphates and hexametaphosphates seem to be the most prevalent.

• 화학적 성질

  transparent, glass-like solid or soft silky masses; hygroscopic; volatilizes at red heat (HPO3)n [MER06]

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