나트륨 붕소수화물

나트륨 붕소수화물
나트륨 붕소수화물 구조식 이미지
카스 번호:
16940-66-2
한글명:
나트륨 붕소수화물
동의어(한글):
나트륨붕소수화물;나트륨테트라히드로붕산염;나트륨히드로붕산염;나트륨보로하이드라이드;보로수소화나트륨;수소화붕소나트륨;테트라하이드로붕산나트륨,SBH;테트라하이드로붕산나트륨;보로수소화나트륨;수소화붕소 나트륨;테트라히드로붕산나트륨
상품명:
Sodium borohydride
동의어(영문):
NaBH4;SODIUM TETRAHYDROBORATE;SODIUM TETRAHYDRIDOBORATE;AF;BH4Na;SBH;sodiumborohydrate;SODIUM BOROHYDRIDE CAPLETS;sodium borohydride solution;Sodium borohydride, 98% min
CBNumber:
CB5322426
분자식:
BH4Na
포뮬러 무게:
37.83
MOL 파일:
16940-66-2.mol

나트륨 붕소수화물 속성

녹는점
>300 °C (dec.) (lit.)
끓는 점
500°C
밀도
1.035 g/mL at 25 °C
증기압
<1 hPa (25 °C)
인화점
158 °F
저장 조건
Store at RT.
용해도
메탄올 (약간 용해됨), 물(용해성)
물리적 상태
플레이크 크리스탈
Specific Gravity
1.4
색상
하얀색
수소이온지수(pH)
11 (10g/l, H2O, 20℃)
폭발한계
3.02%(V)
수용성
550g/L(25℃)
감도
Hygroscopic
Merck
14,8592
안정성
안정성 안정적이지만 물과 쉽게 반응합니다(반응이 격렬할 수 있음). 물, 산화제, 이산화탄소, 할로겐화수소, 산, 팔라듐, 루테늄 및 기타 금속염, 유리와 혼합되지 않습니다. 가연성 고체. 공기에 민감합니다.
InChIKey
YOQDYZUWIQVZSF-UHFFFAOYSA-N
CAS 데이터베이스
16940-66-2(CAS DataBase Reference)
NIST
Sodium tetrahydroborate(16940-66-2)
EPA
Sodium borohydride (16940-66-2)
안전
  • 위험 및 안전 성명
  • 위험 및 사전주의 사항 (GHS)
위험품 표기 F,T,N,C,Xn
위험 카페고리 넘버 60-61-15-34-23/24/25-24/25-35-21/22-51/53-42/43-49-63-62-36/38-43-19-68-50/53
안전지침서 53-43-45-43A-36/37/39-26-22-50-36/37-61
유엔번호(UN No.) UN 3129 4.3/PG 3
WGK 독일 2
RTECS 번호 ED3325000
F 고인화성물질 10-21
자연 발화 온도 220 °C
TSCA Yes
위험 등급 4.3
포장분류 I
HS 번호 28500090
유해 물질 데이터 16940-66-2(Hazardous Substances Data)
독성 LD50 orally in Rabbit: 160 mg/kg LD50 dermal Rabbit 230 mg/kg
기존화학 물질 KE-31365
그림문자(GHS): GHS hazard pictogramsGHS hazard pictogramsGHS hazard pictogramsGHS hazard pictograms
신호 어: Danger
유해·위험 문구:
암호 유해·위험 문구 위험 등급 범주 신호 어 그림 문자 P- 코드
H260 물과 접촉시 자연 발화성 인화성 가스를 발생시킴 물반응성 물질 및 혼합물 구분 1 위험 GHS hazard pictograms P223, P231+P232, P280, P335+ P334,P370+P378, P402+P404, P501
H301 삼키면 유독함 급성 독성 물질 - 경구 구분 3 위험 GHS hazard pictograms P264, P270, P301+P310, P321, P330,P405, P501
H314 피부에 심한 화상과 눈에 손상을 일으킴 피부부식성 또는 자극성물질 구분 1A, B, C 위험 GHS hazard pictograms P260,P264, P280, P301+P330+ P331,P303+P361+P353, P363, P304+P340,P310, P321, P305+ P351+P338, P405,P501
예방조치문구:
P201 사용 전 취급 설명서를 확보하시오.
P231+P232 불활성 기체 하에서 취급하고, 습기를 방지하시오.
P280 보호장갑/보호의/보안경/안면보호구를 착용하시오.
P308+P313 노출 또는 접촉이 우려되면 의학적인 조치· 조언를 구하시오.
P370+P378 화재 시 불을 끄기 위해 (Section 5. 폭발, 화재시 대처방법의 적절한 소화제)을(를) 사용하시오.
P402+P404 건조한 장소에 보관하시오. 밀폐된 용기에 보관하시오.
NFPA 704
1
2 2
W

나트륨 붕소수화물 C화학적 특성, 용도, 생산

용도

주요 용도로는 인쇄 및 염색 산업의 매염제 및 표백 탈지제, 화학 산업의 과산화수소의 대체재, 세제원료로 사용한다.

화학적 성질

Sodium Borohydride is a white, odorless powder or pellet. It is used for bleaching wood pulp, as a blowing agent for plastics, and as a reducing agent for aldehydes and ketones.

물리적 성질

White cubic crystals; hygroscopic; density 1.07 g/cm3; decomposes slowly at about 400°C in vacuum or in moist air; soluble in water, decomposing and evolving hydrogen; also soluble in alcohols, liquid ammonia, amines and pyridine.

제조 방법

Sodium borohydride is prepared by reacting sodium hydride with trimethyl borate at about 250°C: 4 NaH + B(OCH3)3 → NaBH3 + 3NaOCH3
Also, sodium borohydride can be made by passing diborane, B2H6, through a solution of sodium methylate, NaOCH3 , in methanol: 2B2H6 + 3NaOCH3→ 3NaBH3 + B(OCH3)3
Alternatively, diborane may be be passed through a solution of sodium tetramethoxyborohydride at low temperatures: 3 NaB(OCH3)3 + 2B2H6 → 3NaBH3 + 4B(OCH3)3.

생산 방법

Sodium bisulfate is a by-product of sodium sulfate manufacture. One process involves reacting sulfuric acid with sodium nitrate at high temperature to form nitric acid and sodium bisulfate: NaNO3 + H2SO3 → NaHSO4 + HNO3(g)
In the above reaction, nitric acid is obtained as vapor. It is purged from the system and collected in water to obtain nitric acid solution of desired concentration. Sodium bisulfate is separated by fractional crystallization.

정의

ChEBI: Sodium borohydride is an inorganic sodium salt and a metal tetrahydridoborate.

일반 설명

Sodium borohydride is a white to grayish crystalline powder. Sodium borohydride is decomposed by water to form sodium hydroxide, a corrosive material, and hydrogen, a flammable gas. The heat of this reaction may be sufficient to ignite the hydrogen. The material itself is easily ignited and burns vigorously once ignited. Sodium borohydride is used to make other chemicals, treat waste water, and for many other uses.

공기와 물의 반응

Hydrolysis generates enough heat to ignite adjacent combustible material [Haz. Chem. Data 1966]. Dissolves in water with liberation of heat, may steam and spatter. Solution is basic (alkaline). Reaction of water with the borohydride liberates flammable hydrogen gas. Sodium borohydride burns in air [Lab. Gov. Chemist 1965].

반응 프로필

Sodium borohydride is a powerful reducing agent. A chemical base. Absorbs moisture readily forming caustic solution. which attacks aluminum and zinc. A violent polymerization of acetaldehyde results from the reactions of acetaldehyde with alkaline materials such as sodium hydroxide. Calcium oxide or sodium hydroxide react with phosphorus pentaoxide extremely violently when initiated by local heating [Mellor 8 Supp.3:406 (1971]. Using potassium hydroxide to dry impure tetrahydrofuran, which contains peroxides, may be hazardous. Explosions have occurred in the past. Sodium hydroxide behaves in a similar way as potassium hydroxide [NSC Newsletter, Chem. Soc. 1967]. Ignition occurs if a mixture of the hydride and sulfuric acid is not cooled. Contact of glycerol and Sodium borohydride leads to ignition, other glycols and methanol are exothermic but do not ignite.

위험도

Reacts with water to evolve hydrogen and sodium hydroxide. Flammable, dangerous fire risk. Store out of contact with moisture.

건강위험

It is mildly corrosive to skin. Oral intake orintravenous administration of the solid or itssolution produced high toxicity in animals.Ingestion of 160-mg/kg dose was lethal torats (NIOSH 1986).

화재위험

Behavior in Fire: Decomposes and produces highly flammable hydrogen gas.

Safety Profile

Poison by ingestion and intraperitoneal routes. A strong alkali. A severe eye, skin, and mucous membrane irritant. Ignites in air above 288’C when exposed to spark. Potentially explosive reaction with aluminum chloride + bis(2-methoxyethyl) ether. Reacts with ruthenium salts to form a solid product which explodes when touched or on contact with water. Reacts to form dangerously explosive hydrogen gas on contact with alkali, water and other protic solvents (e.g., methanol, ethanol, ethylene glycol, phenol), aluminum chloride + bis(2methoxyethy1)ether. Reacts violently with anhydrous acids (e.g., sulfuric, phosphoric, fluorophosphoric) to form diborane. Violent exothermic reaction with dimethyl formamide has caused industrial explosions. Mixtures with sulfuric acid may ignite. Incompatible with palladium, diborane + bis(2-methoxyethyl) ether, polyglycols, dimethylacetamide, oxidizers, metal salts, finely divided metallic precipitates of cobalt, nickel, copper, iron, and possibly other metals. Emits flammable vapors on contact with acid fumes. Materials sensitive to polymerization under alkaline conditions, such as acrylonitrile, may polymerize upon contact with sodium borohydride. Avoid storage in glass containers. When heated to decomposition it emits toxic fumes of NanO. See also HYDRIDES, BORON COMPOUNDS, and SODIUM COMPOUNDS.

Purification Methods

After adding NaBH4 (10g) to freshly distilled diglyme (120mL) in a dry three-necked flask fitted with a stirrer, nitrogen inlet and outlet, the mixture is stirred for 30minutes at 50o until almost all of the solid has dissolved. Stirring is stopped, and, after the solid has settled, the supernatant liquid is forced under N2 pressure through a sintered-glass filter into a dry flask. [The residue is centrifuged to obtain more of the solution which is added to the bulk.] The solution is cooled slowly to 0o and then decanted from the white needles that separated. The crystals are dried by evacuating for 4hours to give anhydrous NaBH4. Alternatively, after the filtration at 50o the solution is heated at 80o for 2hours to give a white precipitate of substantially anhydrous NaBH4 which is collected on a sintered-glass filter under N2, then evacuated at 60o for 2hours [Brown et al. J Am Chem Soc 77 6209 1955]. NaBH4 has also been crystallised from isopropylamine by dissolving it in the solvent at reflux, cooling, filtering and allowing the solution to stand in a filter flask connected to a Dry-ice/acetone trap. After most of the solvent has passed over into the cold trap, crystals are removed with forceps, washed with dry diethyl ether and dried under vacuum. [Kim & Itoh J Phys Chem 91 126 1987.] Somewhat less pure crystals were obtained more rapidly by using Soxhlet extraction with only a small amount of solvent and extracting for about 8hours. The crystals that formed in the flask are filtered off, then washed and dried as before. [Stockmayer et al. J Am Chem Soc 77 1980 1955.] Other solvents used for crystallisation include water and liquid ammonia.

폐기물 처리

It may be destroyed in several ways. Onemethod is as follows (Aldrich 1995). Thesolid or its solution is dissolved or diluted inlarge volume of water. Diluted acetic acid oracetone is then slowly added to this solutionin a well-ventilated area. Hydrogen generatedfrom decomposition of borohydride shouldbe carefully vented out. The pH is adjustedto 1. The solution is then allowed to stand forseveral hours. It is then neutralized to 7, andthe solution is then evaporated to dryness.The residue is then buried in a landfillsite approved for hazardous waste disposal.Sodium borohydride may be destroyed in thelaboratory by alternative methods mentionedfor other hydrides.

나트륨 붕소수화물 준비 용품 및 원자재

원자재

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