크로뮴산

크로뮴산
Structural formulae of dichromic acid (left) and chromic acid (right)
이름
IUPAC 이름
Chromic acid
체계명
Dihydroxidodioxidochromium
별칭
Chromic(VI) acid
Tetraoxochromic acid
식별자
3D 모델 (JSmol)
ChEBI
ChemSpider
ECHA InfoCard 100.028.910
EC 번호
  • 231-801-5
25982
UNII
UN 번호 1755 1463
  • InChI=1S/Cr.2H2O.2O/h;2*1H2;;/q+2;;;;/p-2 예
    Key: KRVSOGSZCMJSLX-UHFFFAOYSA-L 예
  • InChI=1/Cr.2H2O.2O/h;2*1H2;;/q+2;;;;/p-2/rCrH2O4/c2-1(3,4)5/h2-3H
    Key: KRVSOGSZCMJSLX-OOUCQFSRAZ
  • O[Cr](O)(=O)=O
  • O=[Cr](=O)(O)O
성질
H
2
CrO
4

or H
2
Cr
2
O
7

겉보기 Dark red crystals
밀도 1.201 g cm−3
녹는점 197 °C (387 °F; 470 K)
끓는점 250 °C (482 °F; 523 K) (decomposes)
169 g/100 mL
산성도 (pKa) -0.8 to 1.6
짝염기 Chromate and dichromate
위험
주요 위험 highly toxic, carcinogen, corrosive
GHS 그림문자 GHS03: OxidizingGHS05: CorrosiveGHS06: ToxicGHS07: HarmfulGHS08: Health hazardGHS09: Environmental hazard
신호어 위험
H271, H300, H301, H310, H314, H317, H318, H330, H334, H340, H341, H350, H361, H372
P201, P202, P210, P220, P221, P260, P261, P262, P264, P270, P271, P272, P273, P280, P281, P283, P284, P285, P301+310, P301+330+331, P302+350, P302+352, P303+361+353, P304+340, P304+341
NFPA 704 (파이어 다이아몬드)
반수 치사량 또는 반수 치사농도 (LD, LC):
51.9 mg/kg (H2CrO4·2Na, rat, oral)[2]
NIOSH (미국 건강 노출 한계):
PEL (허용)
TWA 0.005 mg/m3[1]
REL (권장)
TWA 0.001 mg Cr(VI)/m3[1]
IDLH (직접적 위험)
15 mg Cr(VI)/m3[1]
달리 명시된 경우를 제외하면, 표준상태(25 °C [77 °F], 100 kPa)에서 물질의 정보가 제공됨.
예 확인 (관련 정보 예아니오아니오 ?)

크로뮴산(영어: Chromic acid)은 크로뮴산염이 이온화될 때 만들어지거나, 삼산화 크로뮴황산에 녹일 때 얻어진다. 화학식은 H2CrO4 또는 H2Cr2O7이다.

각주

  1. NIOSH Pocket Guide to Chemical Hazards. “#0138”. 미국 국립 직업안전위생연구소 (NIOSH). 
  2. “Chromic acid and chromates”. 《Immediately Dangerous to Life and Health Concentrations (IDLH)》. National Institute for Occupational Safety and Health (NIOSH). 

외부 링크

  • 위키미디어 공용에 크로뮴산 관련 미디어 분류가 있습니다.

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