메틸 레드
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메틸 레드 속성
- 녹는점
- 179-182 °C (lit.)
- 끓는 점
- 412.44°C (rough estimate)
- 밀도
- 0.839 g/mL at 25 °C
- 벌크 밀도
- 300-500kg/m3
- 증기 밀도
- 9.3 (vs air)
- 굴절률
- 1.5930 (estimate)
- 인화점
- 11 °C
- 저장 조건
- Store at +5°C to +30°C.
- 용해도
- 에탄올: 용해성1mg/mL
- 색상 색인 번호
- 13020
- 물리적 상태
- 고체
- 물리적 상태
- 단단한 모양
- 산도 계수 (pKa)
- 4.95(at 25℃)
- 색상
- 붉은 보라색
- 냄새
- 냄새 없는
- pH 범위
- 4.4(red)-6.3(yellow)
- 수용성
- 물에 거의 녹지 않습니다. 알코올, 아세트산에 용해되며, 에탄올에 용해됩니다. 물에 불용성.
- ε (흡광계수)
- ≥10000 at 282-288nm in methanol
≥20000 at 509-519nm in methanol
≥7000 at 329-335nm in methanol
- 최대 파장(λmax)
- 410nm, 530nm, 427nm, 519nm
- Merck
- 14,6119
- BRN
- 750102
- 안정성
- 안정적인. 강한 산화제와 호환되지 않습니다.
- 주요 응용
- Waveguides, LED sensors, photoresists, liquid crystals, sol-gel matrix, optical sensors, paints, toys, detection of thiols, food freshness sensors, dental product, saliva sampling method, detecting lactic acid, carbohydrates
- InChIKey
- CEQFOVLGLXCDCX-MSUUIHNZSA-N
- CAS 데이터베이스
- 493-52-7
- IARC
- 3 (Vol. 8, Sup 7) 1987
안전
- 위험 및 안전 성명
- 위험 및 사전주의 사항 (GHS)
| 위험품 표기 | Xn,T,F,Xi,C,N | ||
|---|---|---|---|
| 위험 카페고리 넘버 | 10-20/21/22-68/20/21/22-68-36/38-23/25-11-36/37/38-34-51/53-39/23/24/25-23/24/25 | ||
| 안전지침서 | 36/37-24/25-22-45-33-24-16-7-36-26-36/37/39-61 | ||
| 유엔번호(UN No.) | UN 1170 3/PG 2 | ||
| WGK 독일 | 1 | ||
| RTECS 번호 | DG8960000 | ||
| TSCA | Yes | ||
| 위험 등급 | 3 | ||
| 포장분류 | II | ||
| HS 번호 | 29270000 | ||
| 유해 물질 데이터 | 493-52-7(Hazardous Substances Data) | ||
| 기존화학 물질 | KE-06693 |
메틸 레드 C화학적 특성, 용도, 생산
화학적 성질
dark red crystalline powder용도
As indicator in 0.1% alcoholic solution; pH: 4.4 red, 6.2 yellow. Used for titrating NH3, weak organic bases, e.g., alkaloids; not suitable for organic acids, except oxalic and picric acid. Methyl red is easily reduced, thereby losing its color, and readings should be made promptly. It is gradually being replaced by sulfonphthalein indicators, such as bromcresol green, which are more stable and exhibit a sharper change in color.제조 방법
2-Aminobenzoic acid?diazo, and N,N-dimethylaniline coupling.정의
An acid–base indicator that is red in solutions below a pH of 4.2 and yellow above a pH of 6.3. It is often used for the same types of titration as methyl orange but the transition range of methyl red is nearer neutral (pH7) than that of methyl orange. The two molecules are structurally similar.일반 설명
Methyl red solution is an azo dye which turns to red when pH is below 4.4 (yellow pH < 6.2, orange pH 4.4-6.2). Some bacteria utilize glucose to form large amounts of acid with the result that the pH value of the medium falls distinct. Other species produce no or less free acid. This difference can be visualized by using methyl red. This test is used to differentiate enteric bacteria.위험도
Questionable carcinogen.Safety Profile
Questionable carcinogen with experimental tumorigenic data. Mutation data reported. When heated to decomposition it emits toxic fumes of NOx.Purification Methods
The acid is extracted with boiling toluene using a Soxhlet apparatus. The crystals which separate on slow cooling to room temperature are filtered off, washed with a little toluene and recrystallised from glacial acetic acid, *benzene or toluene followed by pyridine/water. Alternatively, dissolve it in aqueous 5% NaHCO3 solution, and precipitate it from a hot solution by dropwise addition of aqueous HCl. Repeat this until the extinction coefficients do not increase. [Beilstein 16 IV 504.]메틸 레드 준비 용품 및 원자재
원자재
준비 용품
메틸 레드 공급 업체
글로벌( 415)공급 업체
| 공급자 | 전화 | 이메일 | 국가 | 제품 수 | 이점 |
|---|---|---|---|---|---|
| Shenyang Simchoice Chemical Co.,Ltd | +86-024-23769576 +86-15040101888 |
sales@simchoicechem.com | China | 254 | 58 |
| Hebei Chuanghai Biotechnology Co., Ltd | +8615531157085 |
abby@chuanghaibio.com | China | 8808 | 58 |
| Hebei Mujin Biotechnology Co.,Ltd | +86 13288715578 +8613288715578 |
sales@hbmojin.com | China | 12809 | 58 |
| Hebei Yanxi Chemical Co., Ltd. | +8617531153977 |
allison@yan-xi.com | China | 5854 | 58 |
| Hebei Chuanghai Biotechnology Co,.LTD | +86-13131129325 |
sales1@chuanghaibio.com | China | 5868 | 58 |
| Hebei Zhuanglai Chemical Trading Co.,Ltd | +8613343047651 |
admin@zlchemi.com | China | 3692 | 58 |
| Shanghai Daken Advanced Materials Co.,Ltd | +86-371-+86-371-66670886 |
info@dakenam.com | China | 19805 | 58 |
| Henan Tianfu Chemical Co.,Ltd. | +86-0371-55170693 +86-19937530512 |
info@tianfuchem.com | China | 21628 | 55 |
| career henan chemical co | +86-0371-86658258 +8613203830695 |
sales@coreychem.com | China | 29858 | 58 |
| Hubei Jusheng Technology Co.,Ltd. | 18871490254 |
linda@hubeijusheng.com | CHINA | 28172 | 58 |