{"id":4050,"date":"2021-04-13T12:39:17","date_gmt":"2021-04-13T12:39:17","guid":{"rendered":"https:\/\/longchangchemical.com\/?post_type=product&p=4050"},"modified":"2026-05-08T02:59:34","modified_gmt":"2026-05-08T02:59:34","slug":"bromocresol-green-cas-76-60-8","status":"publish","type":"product","link":"https:\/\/longchangchemical.com\/fr\/product\/bromocresol-green-cas-76-60-8\/","title":{"rendered":"Bromocr\u00e9sol vert CAS 76-60-8"},"content":{"rendered":"

Bromocr\u00e9sol vert CAS 76-60-8<\/strong><\/h2>\n

PH Intervalle de changement de couleur : 3,8 (jaune-vert)-5,4 (bleu)<\/h4>\n

Longueur d'onde d'absorption maximale (nm) : \u03bb1(PH3.8)440-445<\/h4>\n

\u03bb2(PH5.4) 615-618<\/h4>\n

Coefficient d'absorption de masse, L\/(cm.g) : \u03b11(\u03bb1, \u00e9chantillon sec PH3.8)<\/h4>\n

\u03b12(\u03bb1, PH5.4 \u00e9chantillon sec)<\/h4>\n

Test de dissolution dans l'\u00e9thanol : Test r\u00e9ussi<\/h4>\n

Perte au s\u00e9chage : \u22643.0<\/h4>\n

R\u00e9sidus de combustion (en tant que SO4)%' : \u22640,25<\/h4>\n

 <\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n\n
\n

Objet<\/h4>\n<\/td>\n

\n

Sp\u00e9cifications<\/h4>\n<\/td>\n

\n

R\u00e9sultats<\/h4>\n<\/td>\n<\/tr>\n

\n

Essai (%)<\/h4>\n<\/td>\n

\n

\u226598.5<\/h4>\n<\/td>\n

\n

98.9<\/h4>\n<\/td>\n<\/tr>\n

\n

PH Intervalle de changement de couleur<\/h4>\n<\/td>\n

\n

3,8 (jaune-vert)-5,4 (bleu)<\/h4>\n<\/td>\n

\n

R\u00e9ussir l'examen<\/h4>\n<\/td>\n<\/tr>\n

\n

Longueur d'onde d'absorption maximale (mm)<\/h4>\n<\/td>\n

\n

\u03bb1\u00a0<\/sub>(PH3.8)440-445<\/h4>\n<\/td>\n

\n

442<\/h4>\n<\/td>\n<\/tr>\n

\n

\u03bb2\u00a0<\/sub>(PH5.4) 615-618<\/h4>\n<\/td>\n

\n

616<\/h4>\n<\/td>\n<\/tr>\n

\n

Coefficient d'absorption de masse, L\/(cm.g)<\/h4>\n<\/td>\n

\n

\u03b11<\/sub>(\u03bb1<\/sub>PH3.8 \u00e9chantillon sec) 24-28<\/h4>\n<\/td>\n

\n

25<\/h4>\n<\/td>\n<\/tr>\n

\n

\u03b12<\/sub>(\u03bb1<\/sub>PH5.4 \u00e9chantillon sec) 53-58<\/h4>\n<\/td>\n

\n

55<\/h4>\n<\/td>\n<\/tr>\n

\n

Test de dissolution dans l'\u00e9thanol<\/h4>\n<\/td>\n

\n

R\u00e9ussir l'examen<\/h4>\n<\/td>\n

\n

R\u00e9ussir l'examen<\/h4>\n<\/td>\n<\/tr>\n

\n

Perte au s\u00e9chage<\/h4>\n<\/td>\n

\n

\u22643.0<\/h4>\n<\/td>\n

\n

2.1<\/h4>\n<\/td>\n<\/tr>\n

\n

R\u00e9sidus d'allumage (en tant que SO4<\/sub>)%<\/h4>\n<\/td>\n

\n

\u22640.25<\/h4>\n<\/td>\n

\n

0.25<\/h4>\n<\/td>\n<\/tr>\n

\n

Conclusion<\/h4>\n<\/td>\n

\n

Les r\u00e9sultats sont conformes \u00e0 l'indicateur HG\/T4017-2008.<\/h4>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

 <\/p>\n

Vert de bromocr\u00e9sol Utilisation<\/strong><\/h2>\n

Le vert de bromocr\u00e9sol (BCG) est un colorant important qui a de nombreuses applications dans le domaine de l'analyse.<\/h4>\n

1. M\u00e9thode pour tester la teneur en amines libres dans la NMP, comprenant les \u00e9tapes suivantes : pr\u00e9paration de l'indicateur vert-m\u00e9thyl-rouge de bromocr\u00e9sol ; pr\u00e9l\u00e8vement d'une certaine quantit\u00e9 d'\u00e9chantillon de NMP dans un r\u00e9cipient, ajout d'isopropanol et agitation r\u00e9guli\u00e8re pour m\u00e9langer ; ajout de l'indicateur vert-m\u00e9thyl-rouge de bromocr\u00e9sol et m\u00e9lange r\u00e9gulier, titrage avec une solution \u00e9talon d'acide chlorhydrique, titrage du vert au jaun\u00e2tre ; selon la formule :% amine libre=c*V standard*K\/\u03c1*V, calculer le % amine libre dans l'\u00e9chantillon de NMP. La pr\u00e9sente invention pr\u00e9pare l'indicateur vert de bromocr\u00e9sol-rouge de m\u00e9thyle et adopte le titrage acide-base pour tester la teneur en amine dans la NMP. En fonction des param\u00e8tres du processus de titrage acide-base, la teneur en amine libre est exprim\u00e9e en pourcentage massique:% amine libre = c*V standard*K\/\u03c1*V, \u00e9valuer la performance de la NMP en fonction des r\u00e9sultats du test. En outre, la m\u00e9thode d'essai est simple, pratique, rapide et peu co\u00fbteuse, et peut \u00eatre largement utilis\u00e9e dans la production et la recherche.<\/h4>\n

2. Un papier d'essai \u00e0 indicateur mixte pour mesurer la concentration d'ammoniac dans l'air, sa pr\u00e9paration et sa m\u00e9thode de d\u00e9tection appartiennent au domaine technique de la surveillance de l'environnement et de l'hygi\u00e8ne industrielle. Le papier d'essai est un papier charg\u00e9 de vert de bromocr\u00e9sol, de rouge de m\u00e9thyle, d'acide et d'agent tensioactif non ionique sur le papier de base ; selon le rapport de masse, vert de bromocr\u00e9sol : rouge de m\u00e9thyle : acide : agent tensioactif non ionique = (1,0 \uff5e2,0) : (0,188\uff5e0,75) : (0,75\uff5e2,0) : (2,5\uff5e7)\u00d710-3. La m\u00e9thode de pr\u00e9paration est la suivante : pr\u00e9paration d'un liquide de trempage selon le rapport des r\u00e9actifs, trempage du papier de base, s\u00e9chage et scellement plastique. La m\u00e9thode de d\u00e9tection est la suivante : l'ammoniac pr\u00e9sent dans l'air de la zone de d\u00e9tection r\u00e9agit avec le r\u00e9actif m\u00e9lang\u00e9 du papier d'essai, passant du rouge vin au vert, et la concentration d'ammoniac dans l'air de la zone de d\u00e9tection est obtenue en fonction de la relation entre la longueur de la bande de changement de couleur du papier d'essai et la concentration d'ammoniac. Le papier d'essai pr\u00e9sente les caract\u00e9ristiques suivantes : r\u00e9ponse sensible, haute pr\u00e9cision, faible co\u00fbt de production, facilit\u00e9 d'utilisation, etc.
\n3. Ce produit peut utiliser la m\u00e9thode de l'indicateur acide-base pour d\u00e9terminer le degr\u00e9 de d\u00e9sac\u00e9tylation des chitooligosaccharides.<\/h4>\n

 <\/p>\n

Bromocr\u00e9sol vert Emballage<\/strong><\/h2>\n

1kg\/sac 25kg\/tambour.<\/h4>\n

 <\/p>\n

Stockage du vert de bromocr\u00e9sol<\/strong><\/h2>\n

Stocker dans un endroit frais, sec et ventil\u00e9.<\/h4>\n

 <\/p>\n

Produits de la m\u00eame s\u00e9rie<\/strong><\/h2>\n\n\n\n\n
\n

Bromocr\u00e9sol violet<\/span><\/a><\/h4>\n<\/td>\n

\n

115-40-2<\/h4>\n<\/td>\n<\/tr>\n

\n

Vert de bromocr\u00e9sol<\/h4>\n<\/td>\n

\n

76-60-8<\/h4>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

 <\/p>\n

Contactez-nous d\u00e8s maintenant !<\/b><\/strong><\/h2>\n

Si vous avez besoin de COA, MSDS ou TDS, veuillez remplir vos coordonn\u00e9es dans le formulaire ci-dessous, nous vous contacterons g\u00e9n\u00e9ralement dans les 24 heures. Vous pouvez \u00e9galement m'envoyer un courriel info@longchangchemical.com<\/a><\/span> pendant les heures de travail ( 8:30 am to 6:00 pm UTC+8 Mon.~Sat. ) ou utilisez le chat en direct du site web pour obtenir une r\u00e9ponse rapide.<\/b><\/strong><\/h4>\n

 <\/p>","protected":false},"excerpt":{"rendered":"

Nom chimique : vert de bromocr\u00e9sol<\/h4>\n

CAS : 76-60-8<\/h4>\n

Formule mol\u00e9culaire:C21H14Br4O5S<\/h4>\n

Poids mol\u00e9culaire : 698,01<\/h4>\n

Aspect : Cristal jaune<\/h4>","protected":false},"featured_media":4493,"comment_status":"open","ping_status":"closed","template":"","meta":[],"product_brand":[],"product_cat":[69],"product_tag":[],"class_list":{"0":"post-4050","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-catalysts-chemical-auxiliary-agents","8":"first","9":"instock","10":"shipping-taxable","11":"product-type-simple"},"yoast_head":"\nChina Bromocresol green Manufacturer \uff06 Supplier - Longchang chemical Co., Ltd.<\/title>\n<meta name=\"description\" content=\"Longchang Chemical is a leading manufacturer and supplier of Bromocresol green in China. Buy Bromocresol green in china. 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