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CALCIUM PYROPHOSPHATE

CALCIUM PYROPHOSPHATE 구조식 이미지
카스 번호:
7790-76-3
상품명:
CALCIUM PYROPHOSPHATE
동의어(영문):
CPP;CALCIUM DIPHOSPHATE;DICALCIUMDIPHOSPHATE;Calcium pyrophosphat;CALCIUM PYROPHOSPHATE;DICALCIUM PYROPHOSPHATE;CALCIUM PHOSPHATE (PYRO);calciumphosphate(ca2p2o7);Diphosphoricacid,calciumsalt;Calcium phosphate (pyro) min
CBNumber:
CB3449572
분자식:
Ca2O7P2
포뮬러 무게:
254.1
MOL 파일:
7790-76-3.mol

CALCIUM PYROPHOSPHATE 속성

녹는점
1230 °C
밀도
3.09 g/mL at 25 °C(lit.)
용해도
H2O: insoluble(lit.)
물리적 상태
Powder
Specific Gravity
3.09
색상
White
수용성
Soluble in hydrochloric acid and nitric acid. Insoluble in water.
CAS 데이터베이스
7790-76-3(CAS DataBase Reference)
EPA
Diphosphoric acid, calcium salt (1:2) (7790-76-3)
안전
  • 위험 및 안전 성명
  • 위험 및 사전주의 사항 (GHS)
위험품 표기 Xi
위험 카페고리 넘버 36/37/38
안전지침서 26-36
WGK 독일 3
TSCA Yes
HS 번호 28353100
그림문자(GHS):
신호 어: Warning
유해·위험 문구:
암호 유해·위험 문구 위험 등급 범주 신호 어 그림 문자 P- 코드
H315 피부에 자극을 일으킴 피부부식성 또는 자극성물질 구분 2 경고 P264, P280, P302+P352, P321,P332+P313, P362
H319 눈에 심한 자극을 일으킴 심한 눈 손상 또는 자극성 물질 구분 2A 경고 P264, P280, P305+P351+P338,P337+P313P
H335 호흡 자극성을 일으킬 수 있음 특정 표적장기 독성 - 1회 노출;호흡기계 자극 구분 3 경고
예방조치문구:
P261 분진·흄·가스·미스트·증기·...·스프레이의 흡입을 피하시오.
P304+P340 흡입하면 신선한 공기가 있는 곳으로 옮기고 호흡하기 쉬운 자세로 안정을 취하시오.
P305+P351+P338 눈에 묻으면 몇 분간 물로 조심해서 씻으시오. 가능하면 콘택트렌즈를 제거하시오. 계속 씻으시오.
P405 밀봉하여 저장하시오.

CALCIUM PYROPHOSPHATE C화학적 특성, 용도, 생산

개요

Calcium pyrophosphate has the molecular formula of Ca2P2O7 and the molecular weight of 254.1378 g/mol. It has the CAS number of 7790-76-3. It may be prepared by the solid-state reaction of the dibasic orthophosphate, or alternately by the precipitation of a soluble Ca salt with aqueous pyrophosphoric acid:
2CaHPO4 + heat ? Ca2P2O7 +H2O
CaCl2 (aq) +H4P2O7 (aq) ? Ca2P2O7 (solid) + 2HCl (aq)
The solid-state reaction produces an amorphous crystal at 240–500°C. b-Ca2P2O7 forms >750°C and a-Ca2P2O7 forms in the temperature range of 1140 to 1350°C. The free energy of formation, △Gf=-3132 kcal/mol.
The product of the aqueous method is the dihydrate, Ca2P2O7·2H2O. It is a white powder and has the CAS number of 7790-76-3. It is insoluble in water but soluble in dilute acids. The anhydrate decomposes at 1353°C to form a metaphosphate:
Ca2P2O7 + heat ? Ca(PO3)2 + CaO
Calcium pyrophosphate is dimorphic. The phase transformation and sintering behaviors of Ca2P2O7 with different phase composition has been investigated by using X-ray powder diffraction (XRD), dilatometery and SEM techniques. It was found that although α-Ca2P2O7 (high-temperature form) could be maintained during its cooling process, it was metastable and retransformed into β-Ca2P2O7 (low-temperature form) at about 950 °C during its reheating process.

화학적 성질

white powder

용도

Calcium Pyrophosphate is a nutrient and dietary supplement that exists as a white odorless powder, insoluble in water. it is used in dental impression materials and as a buffer.

CALCIUM PYROPHOSPHATE 준비 용품 및 원자재

원자재

준비 용품


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