나프탈렌-2,7-디술폰산
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나프탈렌-2,7-디술폰산 속성
- 녹는점
- 199°C
- 끓는 점
- 400.53°C (rough estimate)
- 밀도
- 1.6867 (rough estimate)
- 굴절률
- 1.6950 (estimate)
- 저장 조건
- 2-8°C
- 산도 계수 (pKa)
- -0.33±0.40(Predicted)
- CAS 데이터베이스
- 92-41-1(CAS DataBase Reference)
안전
- 위험 및 안전 성명
- 위험 및 사전주의 사항 (GHS)
유엔번호(UN No.) | 1759 | ||
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위험 등급 | 8 | ||
포장분류 | III | ||
HS 번호 | 2904100090 |
그림문자(GHS): |
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신호 어: | Danger | ||||||||||||||
유해·위험 문구: |
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예방조치문구: |
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나프탈렌-2,7-디술폰산 C화학적 특성, 용도, 생산
화학적 성질
White, crystalline solid.Soluble in water. Combustible. Naphthalene-2,7-disulfonic acid [92- 41-1]. C10H8O6S2, Mr 288.28; the sodium salt of Naphthalene-2,7-disulfonic acid is much more soluble than that of the 2,6- isomer but can be isolated and purified by precipitation of the calcium salt at lower temperature followed by recrystallization.용도
Intermediate for dyes. The disodium salt of 8 gives 2-hydroxynaphthalene-7-sulfonic acid or 2,7-dihydroxynaphthalene by fusion processes. Sulfonation by oleum gives the 1,3,6-trisulfonic acid, and nitration gives 1-nitronaphthalene-3,6- disulfonic acid. In sulfuric acid solution, the disodium salt of naphthalene-2,7-disulfonic acid undergoes an unusual reaction at the 4-position with 4,40 -bis- (dimethylamino)benzhydrol. The resulting condensation product is oxidized with lead dioxide to give the acid basic dye C.I. Acid Green 16.정의
ChEBI: A naphthalenesulfonic acid in which the sulfo groups are attached to positions 2 and 7 of the naphthalene ring.Purification Methods
Crystallise the acid from conc HCl. The disulfonamide has m 273o (from EtOH). [Beilstein 11 II 119, 11 III 463.]나프탈렌-2,7-디술폰산 준비 용품 및 원자재
원자재
준비 용품
나프탈렌-2,7-디술폰산 공급 업체
글로벌( 66)공급 업체
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