Physical Properties
Characteristic: Dark red crystals or Characteristic: Dark red crystals or . reddish brown powder; melting point: 210 - 211 (dec.) (lit.) density: 0.79 mL / g at 20 C flashpoint: 12 (C) Solubility: Soluble in water, ethanol, slightly soluble in acetone, chloroform, hydrochloric acid and sodium hydroxide solution; the aqueous solution is a bluish red, after dilution with strong fluorescence, red fluorescence with a maximum absorption wavelength of 552 nm, maximum fluorescence wavelength of 610 nm, laser light of peak wavelength of 610 nm and wavelength tuning range of 578 nm to about 610 nm
2 2.
Use
Determination of antimony, bismuth, cobalt, niobium, gold, manganese, mercury, molybdenum, tantalum, thallium, tungsten, and the like; agents for paper, acrylic, silk, leather, dyed feathers, and some metal may be used for food and analytical reagent Determination of antimony, bismuth, cobalt, niobium, gold, manganese, mercury, molybdenum, tantalum, thallium, tungsten, and the like; agents for paper, acrylic, silk, leather, dyed feathers, and some metal may be used for food and analytical reagent . dyeing industry, a glossy paper, typing paper, glazed paper or the like, may also be used for the acrylic fiber, hemp, silk and other fabrics and straw, leather, feather products of dyeing industry, a glossy paper, typing paper, glazed paper or the like, may also be used for the acrylic fiber, hemp, silk and other fabrics and straw, leather, feather products of .
Rhodamine B dye in solution have a strong fluorescence, the fluorescence of the cells in the laboratory is often used as a stain, a stained glass, featuring fireworks industry Rhodamine B dye in solution have a strong fluorescence, the fluorescence of the cells in the laboratory is often used as a stain, a stained glass, featuring fireworks industry . in the cosmetics industry, can be used for body wash, shampoo, cold water or the like of the colored products, but not for use in the eye, in the cosmetics industry, can be used for body wash, shampoo, cold water or the like of the colored products, but not for use in the eye,.
in the oral cavity and lip cosmetic preparation method 1: m - hydroxy diethyl aniline and phthalic anhydride synthesis, then subjected to alkali fusion and then dissolved in sulfuric acid, hydrochloric acid, crystallization, salting out, filtering and drying the goods to a in the oral cavity and lip cosmetic preparation method 1: m - hydroxy diethyl aniline and phthalic anhydride synthesis, then subjected to alkali fusion and then dissolved in sulfuric acid, hydrochloric acid, crystallization, salting out, filtering and drying the goods to a . feedstock consumption (kg / t) of m - hydroxy diethyl aniline and phthalic anhydride (760) 590 600 sulfuric acid hydrochloride (31%) of sodium hydroxide (100%) 390 390 120 refined oil 19 7 method 2: m - hydroxy diethyl - aniline (m) and phthalic anhydride as raw material, alkali fusion, acid dissolution, crystallization, feedstock consumption (kg / t) of m - hydroxy diethyl aniline and phthalic anhydride (760) 590 600 sulfuric acid hydrochloride (31%) of sodium hydroxide (100%) 390 390 120 refined oil 19 7 method 2: m - hydroxy diethyl - aniline (m) and phthalic anhydride as raw material, alkali fusion, acid dissolution, crystallization,.
drying for obtaining finished products drying for obtaining finished products.
Toxicity
In rats, long term feeding study in mice found an increased incidence of multiple organ system tumor phenomenon In rats, long term feeding study in mice found an increased incidence of multiple organ system tumor phenomenon . 3 portion unscrupulous vendors as a substitute for edible agricultural products in Sudan, after eating, cause that body's subcutaneous tissue sarcoma green, a carcinogenic and mutagenic 3 portion unscrupulous vendors as a substitute for edible agricultural products in Sudan, after eating, cause that body's subcutaneous tissue sarcoma green, a carcinogenic and mutagenic .
, which in 2008 listed them as the first "illegal additives in food and non - edible substance and abuse food additives list of Yi" (a) and 2 (b), does not allow for use as food additives and food dye Rhodamine B , which in 2008 listed them as the first "illegal additives in food and non - edible substance and abuse food additives list of Yi" (a) and 2 (b), does not allow for use as food additives and food dye Rhodamine B . due to their low cost, and high stability of characteristics,Illegal businesses is often used as a food additive instead of the colorant of Sudan, to the people's diet brings hidden danger due to their low cost, and high stability of characteristics,Illegal businesses is often used as a food additive instead of the colorant of Sudan, to the people's diet brings hidden danger .
6 6.
Detection
Principle
1, rhodamine B can dissolved, is used as a flavouring (paprika oleoresin) and is the primary stain 1, rhodamine B can dissolved, is used as a flavouring (paprika oleoresin) and is the primary stain . using contaminated spices as food condiments will be caused by residual using contaminated spices as food condiments will be caused by residual .
using Rhodamine B dye content is relatively high, even directly incorporated, may be performed on - site detection using Rhodamine B dye content is relatively high, even directly incorporated, may be performed on - site detection . in food because of its content is low, the required laboratory in food because of its content is low, the required laboratory .
2, the field used for the detection of the non - polar organic solvent (for example, n - hexane, hexane + acetone etc.) will be dissolved and extracted, the extract flows through neutral alumina adsorbing Rhodamine B, non - polar organic solvent (for example, n - hexane eluent to column on platformelution of the sample grease food and endogenous interferences, with the naked eye can be observed in the columella appears on the bright pink stripe, it is determined that the suspicious sample, which sample is sent to the laboratory for further confirmatory test 3, laboratory detection is still used as the non - polar organic solvent (for example, n - hexane, hexane + acetone etc.) on rhodamine B in food from dissolved and extracted, the extract flows through neutral alumina adsorbing Rhodamine B, with a non - polar organic solvent (hexane) to give the Example sample grease and food endogenous interferents, followed by treatment with a polar organic solvent (for example methanol) on rhodamine B from the column by elution and collection,Reversed phase HPLC - UV / visible light detector from the qualitative and quantitative analysis of 
Rhodamine B Rapid Detection
1, paprika: Take a teaspoon paprika (approximately 5 g) is placed into a small beaker, adding about 40 ml containing 20% acetone - hexane (3.3), shaking or stirring for 2 minutes, allowed to stand with Take 5ml plastic syringe sleeve, the lower port into small pieces of cotton wool, making a pre - processed alumina (3. 1) is poured into the syringe tube about 3 cm high, made of alumina, and the sample cup above clarifications, slowly pour in, the lower end is connected with a waste cup, depending on the shade of the colour poured into 2 - 5 ml, taking care not to pour too much, the guarantee of the columella is white middle and still, at this time,Rhodamine B - containing sample in the upper column will appear bright pink fluorescent strip, the strip edge is clear, pink with increasing content of deepening and widening, not containing the rhodamine B sample extract pink stripe does not occur, but will only throw the yellow and red of the unclear interface of the broadband, then impregnated with 20% acetone - hexane (3.3 ml) was slowly poured into the columella, the pink ribbon is not down, but more clearly, the remaining yellow - red tape down, most of the eluted down it may be judged as a sample suspect of containing rhodamine B
2, chili oil: Take a teaspoon chili oil (2 g) was placed in a small beaker,Add about 10 ml of hexane (3.2), mix 5 ml plastic syringe sleeve ,. For the sample suspected of containing rhodamine B
3, determines that is assigned to the sample suspected of containing rhodamine B is required in the laboratory was carried out to detect a verification examination 3, determines that is assigned to the sample suspected of containing rhodamine B is required in the laboratory was carried out to detect a verification examination .
Transport And Storage
Storage And Transport
a cool, dry, sealing preservation a cool, dry, sealing preservation .
Hazard Statement
Dangerous code: Xn, danger level: 22 - 41, the level of security: 26 - 39Dangerous code: Xn, danger level: 22 - 41, the level of security: 26 - 39.
Relevant Event
2011 Feb. 15, "Chongqing Jiao Condiment Limited" in the factory is left in a portion with a bean and chilli sauce found in rhodamine B 3 on March 25, 2011, Jiulongpo District, Chongqing Institute of Quality and Technology Supervision Bureau from food production base of certain brand hotpot condiment is spicy fish, both tested positive for the harmful substances contained in the "deco - loration reaction of rhodamine B with potas - sium", after an examination of the pepper being overcoated with illegal food additives" Rhodamine B " 3 on March 25, 2011, Jiulongpo District, Chongqing Institute of Quality and Technology Supervision Bureau from food production base of certain brand hotpot condiment is spicy fish, both tested positive for the harmful substances contained in the "deco - loration reaction of rhodamine B with potas - sium", after an examination of the pepper being overcoated with illegal food additives" Rhodamine B ".
4 19 September 2012, Shandong High - speed cap on chemicals leakage, roadside villages get red 4 19 September 2012, Shandong High - speed cap on chemicals leakage, roadside villages get red . 1 on September 20, 2012,Changsha City Bureau of Industry and Commerce announced a food safety law enforcement action in the 100 - day countdown to the "abuse and the illegal addition of" Top Ten supervision cases, of which, 6 cases were pointing to the large of rhodamine B in chili products by 1 on September 20, 2012,Changsha City Bureau of Industry and Commerce announced a food safety law enforcement action in the 100 - day countdown to the "abuse and the illegal addition of" Top Ten supervision cases, of which, 6 cases were pointing to the large of rhodamine B in chili products by .
6 6.
