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L-(-)-시스틴

L-(-)-시스틴
L-(-)-시스틴 구조식 이미지
카스 번호:
56-89-3
한글명:
L-(-)-시스틴
동의어(한글):
시스틴;L-(-)-시스틴
상품명:
L-Cystine
동의어(영문):
NPHN;NPHS1;Cystin;(CYS)2;Nephrin;h-(cys);l-cystin;1-cystine;L-CYSTINE;NSC 13203
CBNumber:
CB6394079
분자식:
C6H12N2O4S2
포뮬러 무게:
240.3
MOL 파일:
56-89-3.mol

L-(-)-시스틴 속성

녹는점
>240 °C (dec.)(lit.)
알파
-224 º(c=2 in 1M HCl)
끓는 점
468.2±45.0 °C(Predicted)
밀도
1.68
굴절률
-222.5 ° (C=1, 1mol/L HCl)
저장 조건
Store at RT.
용해도
1 M HCl: 100 mg/mL
물리적 상태
Powder/Solid
산도 계수 (pKa)
1.0, 2.1, 8.02, 8.71(at 25℃)
색상
White
optical activity
[α]20/D 219±5°, c = 1% in 1 M HCl
수용성
0.112 g/L (25 ºC)
Merck
14,2782
BRN
1728094
안정성
Stable. Incompatible with strong oxidizing agents.
InChIKey
LEVWYRKDKASIDU-IMJSIDKUSA-N
CAS 데이터베이스
56-89-3(CAS DataBase Reference)
NIST
L-Cystine(56-89-3)
EPA
L-Cystine (56-89-3)

안전

위험품 표기 Xi,Xn
위험 카페고리 넘버 36/37/38-22
안전지침서 26-36-24/25
유엔번호(UN No.) 2811
WGK 독일 3
RTECS 번호 HA2690000
위험 참고 사항 Irritant
TSCA Yes
포장분류 III
HS 번호 29309014

L-(-)-시스틴 C화학적 특성, 용도, 생산

화학적 성질

A white or almost white, crystalline powder, practically insoluble in water and in alcohol.

용도

L-Cystine is a non-essential amino acid for human development. L-Cystine is formed by the dimerization of two cysteines through the sulfur.

Safety Profile

Low toxicity by ingestion. When heated to decomposition it emits toxic fumes of PO, and SOx

Purification Methods

Cystine disulfoxide impurity is removed by treating an aqueous suspension with H2S. The cystine is filtered off, washed with distilled water and dried at 100o under a vacuum over P2O5. Crystallise it by dissolving in 1.5M HCl, then adjusting to neutral pH with ammonia. Likely impurities are D-cystine, meso-cystine and tyrosine. Also purify it by dissolving it in 10% NH3 and adding gradually dilute AcOH until the point of precipitation and cooling slowly [Dughton & Harrison Acta Cryst 12 396, 402 1959.] Alternatively dissolve it in 6N NH4OH and evaporate it at room temperature for crystallisation to occur. [Chaney & Steinrauf Acta Cryst 30 711 1974, Beilstein 4 IV 3155.]

L-(-)-시스틴 준비 용품 및 원자재

원자재

준비 용품


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