Call us: +30 2106779800

Phenolphthalein 100g | Knowledge Research | why.gr

2106779800
  • English
  • Greek
Phenolphthalein 100g | Knowledge Research | why.gr Phenolphthalein 100g | Knowledge Research | why.gr
Select category
  • Select category
  • Arduino Kits
  • Best Sellers
  • Educational Kits
    • Educational Micro-Scale Kits
      • Consumables (Microscale)
      • Microscale Set
    • Educational Set
      • Biology (SET)
      • Chemistry (SET)
      • CSI
      • Environment
    • Packages of Compulsory Secondary Exercises
      • Biology (kit)
      • Chemistry (kit)
      • Environment (kit)
      • Physics (kit)
    • Physics with experiments – Gymnasium
      • Gymnasium Packages
    • Preschool Science
    • Science for Primary School
      • Packages for 4 teams
      • Student – Order Packages
      • Teacher Packages
    • Science School
    • STEM EDUCATION
      • STEAM Primary School
      • STEM Preschool Education
      • STEM Primary Education
      • STEM Secondary Education
  • Educational Products
    • Arts & Sports
      • Artistic
      • Music
        • Music Learning
      • Sports – Gymnastics
    • Biology
      • Anatomy Models
      • Anatomy Tables
      • Botany – Zoology
      • Consumables of Biology
      • DNA Models
      • Embossed Models – STEM
      • Health Education (Biology)
      • Human Foam Systems
      • Instruments – Devices (Biology)
      • Microscope – Preparations (Biology)
        • Collections of Preparations
        • Individual Preparations
      • Microscopes – Stereoscopes
        • Accessories and Supplies
        • Microscope Cameras
        • Microscopes Binoculars
        • Microscopes Monoculars
        • Stereoscopes
    • Chemistry
      • Chemical Reagents
        • Acids
        • Bases
        • Elements
        • Indicators
        • Organic Compounds
          • Alcohols
        • Oxides
        • Salts
      • Consumables (Chemistry)
      • General Equipment (Laboratory)
      • Glassware
      • Instruments – Devices (Chemistry)
      • Laboratory Scales
      • Microscale Chemistry
      • Nanotechnology
      • Plastics
      • Porcelain – Cheramics
    • Earth Sciences
      • Astronomy (Earth Sciences)
      • Geography (Earth Sciences)
      • Geology (Earth Sciences)
      • Meteorology (Earth Sciences)
    • Environment – Ecology
      • Collection Devices
      • consumables (Environment)
      • Green Chemistry
      • Imaging Models
      • Measuring & Test Sticks
      • Microscope – Preparations (Environment)
      • Observers
      • Quality Analysis Packages
      • Renewable Energy
    • Mathematics
      • Fractions, Decimal, Percentages
      • Geometry
      • Math Games
      • Mathematics Tables
      • Measurements
      • Numbering
      • Operations
      • Premathematical Concepts (Mathematics)
      • Time – Money(Mathematics)
    • Physics
      • Educational Toys for Physics
      • Electricity
      • Electromagnetism
      • Fluid Mechanics – Pressure
      • Heat
      • Magnetism
      • Measurements
      • Mechanics
      • Nanotechnology
      • Optical
      • Static Electricity
      • Waves – Oscillations
    • Preschool
      • Card Games
      • Kindergarten Equipment
        • Classroom Boards
        • Indoor Equipment
        • Outdoors Equipment
      • Language
        • English
        • Hellenic
      • Mathematics (Preschool)
        • Measurement – Classification
        • Numbering (Preschool)
        • Paterns – Rows
        • Possibilities
        • Shapes
      • Motor Skills
        • Fine Motor Skills
        • Gross Motor Skills
      • Music Learning
      • Nursery Robotics
        • Lower Primary
          • Kids First Coding
        • Nursery
          • BeeBot BlueBot ProBot
          • Botley
          • Coding Express
          • EaRL
          • Kids First Coding
        • UARO
        • Upper Primary
      • Outdoor Games
      • Role Playing Games
      • Science
        • Animals – Plants (Preschool)
        • Biology – Health Education
        • Ecology – Astronomy (Preschool)
        • Electricity – Magnetism (Preschool)
        • Exploration (Preschool)
        • Forces – Movement (Preschool)
        • Heat (Preschool)
        • Light – Colors – Sound (Preschool)
        • Time – Measurements (Preschool)
      • Sensory
      • Τoys for Creative Activity
    • School Equipment
      • Design Tools
      • Interactive Boards
      • Marker Markers
      • Projective Systems
      • Saving Boxes
      • School Furniture
      • School Maps
      • School Supplies
    • Special Education
    • Stationary – Handcrafts – Drawing Equipment
      • Drawing Equipment
        • Coloured Pencils
        • Crayons
        • Finger Paints
        • Paint Brushes
        • Paint Markers
        • Painting Blocks
        • Painting Related Products
        • Temperas
        • Watercoloured Paints
      • Handicrafts
        • Beads – Sequins
        • Feathers – Eyes – Pom Pom
        • Felt
        • Glues
        • Gold Dust
        • Masks
        • Model Materials
        • Modeling Clay
        • Modeling Wires
        • Papers – Cardboard – Fabrics
        • Polystyrene
        • Tools
        • Various Handicrafts Materials
      • Kindergarten Supplies
    • Technology
      • Cars – Diesel Iocomotives
      • Consumables Technology
        • Accessories (Consumables)
        • Electricity (Consumables)
        • Gears Pulleys (Consumables)
        • Glues (Consumables)
        • Metallic (Consumables)
        • Plastics (Consumables)
        • Sparkling (Consumables)
        • Stationery (Consumables)
        • Various Construction Materials
        • Wooden (Consumables)
      • Electronics
      • Pre-Cut Constructions
      • Renewable Energy
      • Science Kits (Technology)
      • Smart Materials
      • TechCard Technology Packages
        • Classroom Kit (TechCard)
        • Consumables TechCard
        • TechCard Constructions
        • Thematically Kit (TechCard)
      • Tools (Technology)
      • Wooden Constructions
  • Educational Robotics
    • BeeBot
    • Botley
    • Code your Bot!
    • Gigo
    • Spike
  • Elecfreaks Sensors
  • Gift Cards
  • Grove Actuators
  • Innovative Products
  • Laboratory Equipment
    • Chemical Reagents
      • Acids
      • Bases
      • Elements
      • Indicators
      • Organic Compounds
      • Oxides
      • Salts
    • Fixed Laboratory Equipment
      • Consumables (Laboratory)
      • General Equipment (Laboratory)
      • Glassware
      • Plastics
      • Porcelain – Ceramics
    • Fume Hood
    • Laboratory Cabinets
    • Laboratory Devices
      • Centrifuges
      • Electrolysis Devices
      • Electrophoresis
      • Laboratory Scales
      • Laboratory Thermometers
      • Mixers – Heaters
      • Oxygen meters – Air Analysis
      • PHmeters – Conductivity Meters
      • Pippetes Laboratory
      • Polarimeters – Photometers
      • Portable Autoclaves Sterilizers
      • Power Supplies – Measuring Devices
      • Refractometers
      • Spectrophotometers – Spectrum Pipes
      • Timer Laboratory
      • Vacuum Pumps
      • Water Baths – Incubators – Ovens
    • Medical Equipment
    • Microscopes – Stereoscopes
      • Consumables (Laboratory)
      • Microscope – Preparations
      • Microscope Accessories
      • Microscope Cameras
      • Microscopes Binoculars
      • Microscopes Monoculars
      • Stereoscopes
    • Refrigerator Freezer
    • USB Sensors & MBL Sensors
  • LEGO Education
    • LEGO Education BricQ Motion
    • LEGO Education Mindstorms
    • LEGO Education Preschool
    • LEGO Education Primary
    • LEGO Education STEM
    • Lego Education WeDo 2.0
  • Lego Education
  • Offers
  • Open Hardware
    • 3D Printing
    • Arduino
      • Arduino Bots and Devices
      • Arduino Main Boards
    • DFRobot
    • Drones
    • Elecfreaks
      • Elecfreaks Kits
    • Grove System
      • Grove Displays Keyboards Buttons
      • Grove Sensors
    • Keyestudio
    • MicroBit
      • MIcrobit Accessories
      • MicroBit Shields
    • Motors and Actuators
    • Raspberry Pi
    • Sales
      • Arduino Offers
      • Electronic Components
      • Electronic Modules
      • HiTechnic
      • LEGO NXT
      • Mechanical Components
    • Sensors
    • WaveShare
  • Stem Toys
  • Uncategorized
Login / Register
Sign inCreate an Account

Lost your password?
Wishlist
Menu
Phenolphthalein 100g | Knowledge Research | why.gr Phenolphthalein 100g | Knowledge Research | why.gr
0 items / €0,00
  • Products
    • Educational Products
      • Special Education
      • Stationary – Handcrafts – Drawing Equipment
      • Physics
      • Chemistry
      • Biology
      • Mathematics
      • Environment – Ecology
      • Earth Sciences
      • Technology
      • Preschool
      • School Equipment
      • Arts & Sports
    • Laboratory Equipment
      • Laboratory Devices
      • Fixed Laboratory Equipment
      • Chemical Reagents
      • Medical Equipment
      • Microscopes – Stereoscopes
    • Educational Kits
      • Science School
      • STEM EDUCATION
      • Preschool Science
      • Science for Primary School
      • Packages of Compulsory Secondary Exercises
      • Physics with experiments – Gymnasium
      • Educational Set
      • Educational Micro-Scale Kits
    • Educational Robotics
      • BeeBot
      • Code your Bot!
      • Gigo
      • Botley
      • Spike
    • Open Hardware
      • MicroBit
      • Phenolphthalein 100g | Knowledge Research | why.grKeyestudio
      • DFRobot
      • WaveShare
      • Arduino
      • Raspberry Pi
      • Drones
      • Elecfreaks
      • Grove System
      • Sales
      • Sensors
      • Motors and Actuators
      • 3D Printing
  • Stem Toys
  • Proposals
  • B2B
  • News
  • Competitions
    • Competitions of educational robotics
0 items / €0,00
  • English
  • Ελληνικα (Greek)

Phenolphthalein 100g | Knowledge Research | why.gr

Phenolphthalein 100g | Knowledge Research | why.gr
Click to enlarge
Home Κατάστημα Laboratory Equipment Chemical Reagents Indicators Phenolphthalein 100g
Phenolphthalein 100g | Knowledge Research | why.gr
Paraffin wax mp 58-60 °C in pellets 500g €12,90 €16,00 με ΦΠΑ
Back to products
Phenolphthalein 100g | Knowledge Research | why.gr
Lugol’s Iodine 5% Solution 125ml €20,16 €25,00 με ΦΠΑ

Phenolphthalein 100g

€20,16 €25,00 με ΦΠΑ

Phenolphthalein 100g
3,3-Bis(4-hydroxyphenyl)-2-benzofuran-1(3H)-one
C20H14O4
MW: 318.328 g·mol−1
https://pubchem.ncbi.nlm.nih.gov/compound/4764

Add to wishlist
SKU: 330792 Categories: Chemical Reagents, Chemical Reagents, Indicators, Indicators
Share:
  • Description
Description

Phenolphthalein 100g

Phenolphthalein 100g
3,3-Bis(4-hydroxyphenyl)-2-benzofuran-1(3H)-one
C20H14O4
MW: 318.328 g·mol−1
https://pubchem.ncbi.nlm.nih.gov/compound/4764

Phenolphthalein is a chemical compound with the formula C20H14O4 and is often written as “HIn“, “HPh“, “phph” or simply “Ph” in shorthand notation. Phenolphthalein is often used as an indicator in acid–base titrations. For this application, it turns colorless in acidic solutions and pink in basic solutions. It belongs to the class of dyes known as phthalein dyes.

Phenolphthalein is slightly soluble in water and usually is dissolved in alcohols for use in experiments. It is a weak acid, which can lose H+ ions in solution. The nonionized phenolphthalein molecule is colorless and the double deprotonated phenolphthalein ion is fuchsia. Further loss of proton in higher pH occurs slowly and leads to a colorless form. Phenolphthalein ion in concentrated sulfuric acid is orange red due to sulfonation.

Uses

pH indicator

Phenolphthalein’s common use is as an indicator in acid-base titrations. It also serves as a component of universal indicator, together with methyl red, bromothymol blue, and thymol blue.

Phenolphthalein adopts different forms in aqueous solution depending on the pH of the solution. Inconsistency exists in the literature with regard to the hydrated forms of the compounds and the color in sulfuric acid. Wittke reported in 1983 that under strongly acidic conditions, it exists in protonated form (HIn+), providing an orange coloration. However, later paper suggested that this color is due to sulfonation to phenolsulfonphthalein.

Between strongly acidic and slightly basic conditions, the lactone form (HIn) is colorless. The doubly deprotonated (In2-) phenolate form (the anion form of phenol) gives the familiar pink color. In strongly basic solutions, phenolphthalein is converted to its In(OH)3− form, and its pink color undergoes a rather slow fading reaction and becomes completely colorless when pH is greater than 13.

The pKA values of phenolphthalein was found to be 9.05, 9.50 and 12 while that of phenolsulfonphthalein are 1.2 and 7.70.

Species H3In+ H2In In2− In(OH)3−
Structure Phenolphthalein 100g | Knowledge Research | why.gr Phenolphthalein 100g | Knowledge Research | why.gr Phenolphthalein 100g | Knowledge Research | why.gr Phenolphthalein 100g | Knowledge Research | why.gr
Model Phenolphthalein 100g | Knowledge Research | why.gr Phenolphthalein 100g | Knowledge Research | why.gr Phenolphthalein 100g | Knowledge Research | why.gr Phenolphthalein 100g | Knowledge Research | why.gr
pH <-1 in H2SO4[4] 0−8.3 8.3−10.0[7] >10.0
Conditions strongly acidic acidic or near-neutral basic strongly basic
Color orange colorless pink to fuchsia colorless
Image Phenolphthalein 100g | Knowledge Research | why.gr Phenolphthalein 100g | Knowledge Research | why.gr
Phenolphthalein 100g | Knowledge Research | why.gr
An animation of the pH dependent reaction mechanism: H3In+ → H2In → In2− → In(OH)3−

Medical uses

Phenolphthalein has been used for over a century as a laxative, but is now being removed from over-the-counter laxatives because of concerns over carcinogenicity. Laxative products formerly containing phenolphalein have often been reformulated to have alternate active ingredients: Feen-a-Mint switched to bisacodyl and Ex-Lax  was switched to a senna extract.

Thymolphthalein is a related laxative made from thymol.

Despite concerns regarding its carcinogenicity, the use of phenolphthalein as a laxative is unlikely to cause ovarian cancer. Phenolphthalein has been found to inhibit human cellular calcium influx via store-operated calcium entry (SOCE, see Calcium release activated channel § Structure). This is effected by its inhibiting thrombin and thapsigargin, two activators of SOCE that increase intracellular free calcium.

Phenolphthalein has been added to the European Chemicals Agency‘s candidate list for Substances of Very High Concern (SVHC).

A reduced form of phenolphthalein, phenolphthalin, which is colorless, is used in a test to identify substances thought to contain blood, commonly known as the Kastle–Meyer test. A dry sample is collected with a swab or filter paper. A few drops of alcohol, then a few drops of phenolphthalin, and finally a few drops of hydrogen peroxide are dripped onto the sample. If the sample contains hemoglobin, it will turn pink immediately upon addition of the peroxide, because of the generation of phenolphthalein.
A positive test indicates the sample contains hemoglobin and, therefore, is likely blood. A false positive can result from the presence of substances with catalytic activity similar to hemoglobin. This test is not destructive to the sample; it can be kept and used in further tests. This test has the same reaction with blood from any animal whose blood contains hemoglobin, including almost all vertebrates; further testing would be required to determine whether it originated from a human.

Related products

Phenolphthalein 100g | Knowledge Research | why.gr

Fuchsine basic (25gr)

€19,90 €24,68 με ΦΠΑ 330855

Φουξίνη 25g βασική
Fuchsine, 4-[(4-Aminophenyl)-(4-imino-1-cyclohexa-2,5-dienylidene)methyl]aniline hydrochloride
C20H19N3·HCl
M.W: 337.86 g/mol (hydrochloride)
Cas Number: 632-99-5
https://pubchem.ncbi.nlm.nih.gov/compound/Basic-violet-14

Add to wishlist
Add to cart
Quick view
Phenolphthalein 100g | Knowledge Research | why.gr

Litmus Solution (100ml)

€12,90 €16,00 με ΦΠΑ 330700
[:en] Litmus Solution (100ml) [:]
Add to wishlist
Add to cart
Quick view
Phenolphthalein 100g | Knowledge Research | why.gr

tri-Sodium Citrate dihydrate 250g

€18,55 €23,00 με ΦΠΑ 330205
tri-Sodium Citrate dihydrate 250g 99% Trisodium citrate, Citrosodine, Trisodium 2-hydroxypropane-1,2,3-tricarboxylate Na3C6H5O7 2H2O M.W: 258.06 g/mol (anhydrous), 294.10 g/mol (dihydrate) CAS Registry Number: 6132-04-3
Add to wishlist
Add to cart
Quick view
Phenolphthalein 100g | Knowledge Research | why.gr

Zinc Sulfate 7-hydrate 250gr

€7,98 €9,90 με ΦΠΑ 330168
Zinc Sulfate 7-hydrate 250gr Zinc Sulfate is an inorganic compound. It is used as a dietary supplement to treat zinc deficiency and to prevent the
Add to wishlist
Add to cart
Quick view
Phenolphthalein 100g | Knowledge Research | why.gr

Eriochrome Black T (25gr)

€12,10 €15,00 με ΦΠΑ 330810
Eriochrome Black T (25gr) Sodium 1-[1-Hydroxynaphthylazo]-6-nitro-2-naphthol-4-sulfonate, Sodium 4-[2-(1-hydroxynaphthalen-2-yl)hydrazin-1-ylidene]-7-nitro-3-oxo-3,4-dihydronaphthalene-1-sulfonate, Sodium 4-[2-(1-hydroxynaphthalen-2-yl)hydrazin-1-ylidene]-7-nitro-3-oxonaphthalene-1-sulfonate; Solochrome Black T; ET-00; Erio T C20H12N3O7SNa 461.381 g/mol Cas Number: 1787-61-7 https://en.wikipedia.org/wiki/Eriochrome_Black_T
Add to wishlist
Add to cart
Quick view
Phenolphthalein 100g | Knowledge Research | why.gr

Ammonium Thiocyanate (250gr)

€14,92 €18,50 με ΦΠΑ 330174
Ammonium Thiocyanate (250gr)
CAS Number
  • 1762-95-4 Phenolphthalein 100g | Knowledge Research | why.gr
Chemical formula
NH4SCN
Molar mass 76.122 g/mol
Appearance Colorless hygroscopic crystalline solid
Density 1.305 g/cm3
Melting point 149.5 °C (301.1 °F; 422.6 K)
Boiling point 170 °C (338 °F; 443 K) (decomposes)
Solubility in water
128 g/100 mL (0 °C)
Solubility soluble in liquid ammonia, alcohol, acetone
Add to wishlist
Add to cart
Quick view
Phenolphthalein 100g | Knowledge Research | why.gr

Methylene Blue (100ml)

€11,20 €13,89 με ΦΠΑ 330765
Methylene Blue (100ml) alkaline Loeffler’s staining solution
Add to wishlist
Add to cart
Quick view
Phenolphthalein 100g | Knowledge Research | why.gr

Nitric Acid 2.5lt 69% 15N

€32,26 €40,00 με ΦΠΑ 330274
Nitric Acid 2.5lt 69% 15N Nitric acid, Aqua fortis, Spirit of niter, Hydrogen nitrate, Acidum nitricum HNO3 M.W. : 63.01 (g/mol) CAS Number : 7697-37-2 https://pubchem.ncbi.nlm.nih.gov/compound/Nitric-acid
Add to wishlist
Add to cart
Quick view
Our company
  • Profile
  • Activities
  • Shop
  • Workshops
  • Contact
Information
  • My Account
  • Transaction Security
  • Terms & Conditions
  • Payment, Delivery & Mission
  • Personal Data Protection
CONTACT
+30 210 6779800 info@why.gr Mesogeiwn 446, 153 42 Agia Paraskeuh
Newsletter
Subscribe
Copyright © 2020 why.gr - Διερευνητική Μάθηση All Rights Reserved.
payments
  • Products
    • Educational Products
      • Special Education
      • Stationary – Handcrafts – Drawing Equipment
      • Physics
      • Chemistry
      • Biology
      • Mathematics
      • Environment – Ecology
      • Earth Sciences
      • Technology
      • Preschool
      • School Equipment
      • Arts & Sports
    • Laboratory Equipment
      • Laboratory Devices
      • Fixed Laboratory Equipment
      • Chemical Reagents
      • Medical Equipment
      • Microscopes – Stereoscopes
    • Educational Kits
      • Science School
      • STEM EDUCATION
      • Preschool Science
      • Science for Primary School
      • Packages of Compulsory Secondary Exercises
      • Physics with experiments – Gymnasium
      • Educational Set
      • Educational Micro-Scale Kits
    • Educational Robotics
      • BeeBot
      • Code your Bot!
      • Gigo
      • Botley
      • Spike
    • Open Hardware
      • MicroBit
      • Phenolphthalein 100g | Knowledge Research | why.grKeyestudio
      • DFRobot
      • WaveShare
      • Arduino
      • Raspberry Pi
      • Drones
      • Elecfreaks
      • Grove System
      • Sales
      • Sensors
      • Motors and Actuators
      • 3D Printing
  • Stem Toys
  • Proposals
  • B2B
  • News
  • Competitions
    • Competitions of educational robotics
  • Wishlist
  • Login / Register
Shopping cart
close
We use cookies to improve your experience on our website. By browsing this website, you agree to our use of cookies.
Accept