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2,2-다이메틸프로판산

2,2-다이메틸프로판산
2,2-다이메틸프로판산 구조식 이미지
카스 번호:
75-98-9
한글명:
2,2-다이메틸프로판산
동의어(한글):
2,2-다이메틸프로판산
상품명:
Pivalic acid
동의어(영문):
PivoH;versatic5;PA)Pivalic;PIVALIC ACID;Pivalinsαure;Pivaloylacid;Versatic5acid;tert-C4H9COOH;2.2-DiMethylpr;acidepivalique
CBNumber:
CB4244051
분자식:
C5H10O2
포뮬러 무게:
102.13
MOL 파일:
75-98-9.mol

2,2-다이메틸프로판산 속성

녹는점
32-35 °C(lit.)
끓는 점
163-164 °C(lit.)
밀도
0.889 g/mL at 25 °C(lit.)
증기 밀도
3.6 (vs air)
증기압
9.75 mm Hg ( 60 °C)
굴절률
1.393
인화점
147 °F
저장 조건
Store below +30°C.
용해도
25g/l
산도 계수 (pKa)
5.03(at 25℃)
물리적 상태
Powder, Crystals and/or Chunks
Specific Gravity
1.121
색상
Yellow to orange to tan
폭발한계
1.6%(V)
수용성
25 g/L (20 ºC)
Merck
14,7511
BRN
969480
InChIKey
IUGYQRQAERSCNH-UHFFFAOYSA-N
CAS 데이터베이스
75-98-9(CAS DataBase Reference)
NIST
Pivalic acid(75-98-9)
EPA
Pivalic acid (75-98-9)
안전
  • 위험 및 안전 성명
  • 위험 및 사전주의 사항 (GHS)
위험품 표기 C
위험 카페고리 넘버 21/22-34
안전지침서 26-36/37/39-45
유엔번호(UN No.) UN 3261 8/PG 2
WGK 독일 1
RTECS 번호 TO7700000
TSCA Yes
위험 등급 8
포장분류 II
HS 번호 29159000
유해 물질 데이터 75-98-9(Hazardous Substances Data)
독성 LD50 orally in Rabbit: 900 mg/kg LD50 dermal Rat 1900 mg/kg
기존화학 물질 97-3-5
그림문자(GHS):
신호 어: Danger
유해·위험 문구:
암호 유해·위험 문구 위험 등급 범주 신호 어 그림 문자 P- 코드
H302 삼키면 유해함 급성 독성 물질 - 경구 구분 4 경고 P264, P270, P301+P312, P330, P501
H312 피부와 접촉하면 유해함 급성 독성 물질 - 경피 구분 4 경고 P280,P302+P352, P312, P322, P363,P501
H314 피부에 심한 화상과 눈에 손상을 일으킴 피부부식성 또는 자극성물질 구분 1A, B, C 위험 P260,P264, P280, P301+P330+ P331,P303+P361+P353, P363, P304+P340,P310, P321, P305+ P351+P338, P405,P501
H318 눈에 심한 손상을 일으킴 심한 눈 손상 또는 자극성 물질 구분 1 위험 P280, P305+P351+P338, P310
예방조치문구:
P280 보호장갑/보호의/보안경/안면보호구를 착용하시오.
P309 노출되었거나 몸이 편치 않은 경우
P310 즉시 의료기관(의사)의 진찰을 받으시오. 삼켰다면 즉시 의료기관(의사)의 도움을 받으시오.
P305+P351+P338 눈에 묻으면 몇 분간 물로 조심해서 씻으시오. 가능하면 콘택트렌즈를 제거하시오. 계속 씻으시오.

2,2-다이메틸프로판산 C화학적 특성, 용도, 생산

화학적 성질

white crystalline low melting mass

용도

Pivalic Acid is a metabolite of oral cephem (β-lactam) antibiotics such as S-1108, containing pivaloyl moieties.

Synthesis Reference(s)

Journal of the American Chemical Society, 98, p. 1275, 1976 DOI: 10.1021/ja00421a046
Organic Syntheses, Coll. Vol. 1, p. 524, 1941

일반 설명

Pivalic acid is a colored crystalline solid of low toxicity that is soluble in water, ethyl alcohol and diethyl ether.

공기와 물의 반응

With mixing, water soluble.

반응 프로필

Pivalic acid is a carboxylic acid. Carboxylic acids donate hydrogen ions if a base is present to accept them. They react in this way with all bases, both organic (for example, the amines) and inorganic. Their reactions with bases, called "neutralizations", are accompanied by the evolution of substantial amounts of heat. Neutralization between an acid and a base produces water plus a salt. Carboxylic acids with six or fewer carbon atoms are freely or moderately soluble in water; those with more than six carbons are slightly soluble in water. Soluble carboxylic acid dissociate to an extent in water to yield hydrogen ions. The pH of solutions of carboxylic acids is therefore less than 7.0. Many insoluble carboxylic acids react rapidly with aqueous solutions containing a chemical base and dissolve as the neutralization generates a soluble salt. Carboxylic acids in aqueous solution and liquid or molten carboxylic acids can react with active metals to form gaseous hydrogen and a metal salt. Such reactions occur in principle for solid carboxylic acids as well, but are slow if the solid acid remains dry. Even "insoluble" carboxylic acids may absorb enough water from the air and dissolve sufficiently in Pivalic acid to corrode or dissolve iron, steel, and aluminum parts and containers. Carboxylic acids, like other acids, react with cyanide salts to generate gaseous hydrogen cyanide. The reaction is slower for dry, solid carboxylic acids. Insoluble carboxylic acids react with solutions of cyanides to cause the release of gaseous hydrogen cyanide. Flammable and/or toxic gases and heat are generated by the reaction of carboxylic acids with diazo compounds, dithiocarbamates, isocyanates, mercaptans, nitrides, and sulfides. Carboxylic acids, especially in aqueous solution, also react with sulfites, nitrites, thiosulfates (to give H2S and SO3), dithionites (SO2), to generate flammable and/or toxic gases and heat. Their reaction with carbonates and bicarbonates generates a harmless gas (carbon dioxide) but still heat. Like other organic compounds, carboxylic acids can be oxidized by strong oxidizing agents and reduced by strong reducing agents. These reactions generate heat. A wide variety of products is possible. Like other acids, carboxylic acids may initiate polymerization reactions; like other acids, they often catalyze (increase the rate of) chemical reactions.

건강위험

CALL FOR MEDICAL AID. SOLID: Irritating to eyes and skin. Harmful if swallowed. IF IN EYES OR ON SKIN, flush with running water for at least 15 minutes; hold eyelids open if necessary. Wash skin with soap and water. Remove and isolate contaminated clothing and shoes at the site. If SWALLOWED and victim is UNCONSCIOUS OR HAVING CONVULSIONS, do nothing except keep victim warm. Because of low volatility, it is relatively harmless when inhaled at normal ambient temperature (around 20°C). It is slightly toxic by ingestion or skin absorption. The vapor is irritating at elevated temperatures. Can cause considerable discomfort by oral routes; may cause reversible or irreversible changes to exposed tissue, not permanent injury or death.

화재위험

COMBUSTIBLE. Produces vapors irritating to eyes and skin. Decomposes to produce acrid smoke and fumes.

Safety Profile

Moderately toxic by ingestion and skin contact. Questionable carcinogen with experimental tumorigenic data. When heated to decomposition it emits acrid smoke and irritating fumes.

Purification Methods

Fractionally distil the acid under reduced pressure, then fractionally crystallise it from its melt. Recrystallise it from *benzene. [Beilstein 2 IV 908.]

2,2-다이메틸프로판산 준비 용품 및 원자재

원자재

준비 용품


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