다이크로뮴산 암모늄

다이크로뮴산암모늄 · 디크롬산디암모늄 · 이크롬산암모늄 · 이크롬산암모늄(IV) · 크롬산암모늄(Ⅱ) · 중크롬산암모늄 · 암모늄다이크로메이트 · 암모늄 다이크로메이트

https://huagongshe.com/ko/chemical/24600

식별자 및 물리적 특성

CAS No.	7789-09-5
분자식	Cr2H2O7.2H3N
평균 분자량	252.07 g/mol
단동위원소 질량	251.9141656 g/mol
SMILES	[NH4+].[NH4+].[O]=[Cr](=[O])([O-])[O][Cr](=[O])(=[O])[O-]
InChIKey	JOSWYUNQBRPBDN-UHFFFAOYSA-P
PubChem CID	24600
EC No.	232-143-1
DTXSID	DTXSID70872953
현지명	다이크로뮴산 암모늄

화학 및 물리적 성질

극성 표면적	126
수소 결합 공여자 수	2
수소 결합 수용자 수	7
회전 가능 결합 수	0
무거운 원자 수	11
형식 전하	0
복잡도	194
물질 분류	Metals -> Chromium Compounds, InorganicCarcinogens
pH	1% solution has pH of 3.9510% solution has pH of 3.453-4 (25°C, 50g/L)
냄새	Odorless냄새 없는
밀도	2.15 at 77 °F (USCG, 1999) - Denser than waterwill sink2.155 g/cu cm at 25 °CNon-hygroscopicbulk density: 82 lb/cu ftdecomposes at about 180 °Cdecomposes becomes self-sustaining at about 225 °C with spectacular swelling and evolution of heat and nitrogen, leaving Cr2O3. Heat of solution: -23.0 cal/g2.15 g/cm³2.155 @25 °C2.150
Color/Form	Bright orange-red monoclinic prismsSolid at 15 °C and 1 atmOrange needles
용해도	35.6 g/100 g water at 20 °CIn water (wt/wt): 15.16% at 0 °C26.67% at 20 °C36.99% at 40 °C46.14% at 60 °C54.20% at 80 °C60.89% at 100 °CIn water: 30.8 g/100 mL at 15 °C89 g/100 mL at 30 °CSolubility in water, g/100ml at 20 °C: 36 (good)H2O: 1 M at 20 °C, 투명, 무색
Decomposition	Thermal decomposition is initiated by locally heating to 190 °C, and flame spreads rapidly through the mass.Ammonium dichromate can undergo thermal decomposition and produce a violent conflagration. It is a strong oxidizing agent and flammable solid.180 °C
녹는점	Decomposes 180 °C170 °C170 °C (dec.)(lit.)
Physical Description	Ammonium dichromate is a bright orange red crystalline solid. It is readily ignited and burns producing a voluminous green residue. If heated in a closed container, the container may rupture due to the decomposition of the material. It may also act as a strong oxidizing agent if mixed with or contaminated with combustible material. It is soluble in water.Bright orange-red odorless solidVery soluble in water[Merck Index] Orange solid[ACGIH]ORANGE-TO-RED CRYSTALS.
Stability/Shelf Life	Stable under recommended storage conditions.Stable during transport.
자연 발화 온도	437 °F (USCG, 1999)225 °C
Other Experimental Properties	Decomposes vigorously with luminescence around 200 °CAir-stable
증기 밀도	8.7 (vs air)
물리적 상태	고체
색상	주황색에서 빨간색으로
용해도	360g/L(20℃)
Merck	14,515
안정성	안정성 강산화제 - 가연성 물질과 접촉하면 화재가 발생할 수 있습니다. 밀폐된 용기 내에서 반응이 일어나면 폭발을 일으킬 수 있습니다. 유기 물질과 호환되지 않으며 강력한 환원제입니다.
InChI	1S/2Cr.2H3N.2H2O.5O/h21H321H2/q2*+1/p-2
InChIKey	XAQCJVGGJJFLPP-UHFFFAOYSA-L
SMILES	N.N.O[Cr](=O)(=O)O[Cr](O)(=O)=O
EPA	Ammonium dichromate(VI) (7789-09-5)

화학적 성질

Ammonium dichromate is a combustible, orange-red crystalline solid which is used in solution.

안전 및 규제

GHS 분류	DangerH272: May intensify fireoxidizer [Danger Oxidizing liquidsOxidizing solids]P203, P210, P220, P233, P260, P261, P264, P270, P271, P272, P273, P280, P284, P301+P316, P301+P330+P331, P302+P352, P302+P361+P354, P304+P340, P305+P354+P338, P316, P317, P318, P319, P320, P321, P330, P333+P317, P342+P316, P362+P364, P363, P370+P378, P391, P403, P403+P233, P405, and P501 (click each P-code to see the statement)H272 (99.5%): May intensify fireP203, P210, P220, P233, P260, P261, P264, P264+P265, P270, P271, P272, P273, P280, P284, P301+P316, P301+P330+P331, P302+P352, P302+P361+P354, P304+P340, P305+P354+P338, P316, P317, P318, P319, P320, P321, P330, P333+P317, P342+P316, P362+P364, P363, P370+P378, P391, P403, P403+P233, P405, and P501 (click each P-code to see the statement)
규제 정보	Chemical: Chromic acid (H2Cr2O7), diammonium saltHazard Traits - CarcinogenicityGenotoxicityReproductive ToxicityRespiratory ToxicityREACH registered substance: Ammonium dichromate (EC: 232-143-1)Restricted substance: Ammonium dichromateSubstance: Ammonium dichromateChromic acid, diammonium salt: HSNO Approval: HSR001309 Approved with controls
기타 안전 정보	IMAP assessments - Chromates and dichromates (soluble): Human health tier II assessment
운송 라벨(DOT)	Oxidizer
화재 위험	Special Hazards of Combustion Products: Greenish chromic oxide smoke may cause irritation of lungs and mucous membranes.· These substances will accelerate burning when involved in a fire.Not combustible but enhances combustion of other substances. Risk of fire and explosion on contact with combustible substances.
화재 가능성	Moderately flammable.
건강 유해성	Inhalation causes irritation or ulceration of the mucous membranes of the nose, throat or respiratory tract. Respiratory irritation can produce symptoms resembling those of asthma. Continuing irritation of the nose may lead to perforation of the nasal septum. External contact can cause eye irritation and conjunctivitis, irritation and ulceration of skin wounds, and rash or external ulcers. If ingested, irritates mucous membrane and causes vomiting. (USCG, 1999)

용도

출처

Bright orange-red monoclinic crystals; odorless; hygroscopic; decomposes at 180°C; density 2.115 g/cm3 at 25°C; readily dissolves in water (26.67 g/100 g at 20°C).

용도

Ammonium dichromate is used in photo engraving, dye mordant, pigments, pickling, photography, process engraving, lithography, pyrotechnics, glazes for porcelain and china wares. It acts as a catalyst and a source of nitrogen in the laboratory and as the photoactive site. It is also used in the preparation of alizarin and chrome alum. Further, it is used in leather and oil industry for tanning and purification respectively. It is involved in the production of the phosphor raster television screens and other devices.

일반 설명

Ammonium dichromate is a bright orange red crystalline solid. Ammonium dichromate is readily ignited and burns producing a voluminous green residue. If heated in a closed container, the container may rupture due to the decomposition of the material. Ammonium dichromate may also act as a strong oxidizing agent if mixed with or contaminated with combustible material. Ammonium dichromate is soluble in water.