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Zhishang Chemical

Pure Castor Oil CAS 8001-79-4

Molecular Formula: C57H104O9

Formula Weight: 933.43026

ZSpharmac: Pure Castor Oil Supplement

Product Name: Pure Castor Oil
CAS No: 8001-79-4
Purity: 99%

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Basic Info

Product Name:Pure Castor Oil
Other Names:Castor Oil
Place of Origin:Shandong, China
Brand Name:ZSpharmac
Type:Cosmetic Raw Materials
Appearance:Slightly Yellow Viscous Hygroscopic Liquid
EINECS No.:232-293-8
Storage:Room Temperature, Under Inert Atmosphere
Provide:Pure Castor Oil MSDS;
Pure Castor Oil COA

What is Pure Castor Oil?

Pure Castor Oil is a fatty oil extracted from the seeds of the Euphorbiaceae Ricinus communis plant. It is nearly anemic or slightly yellow-colored clear viscous liquid at space temperature, slightly odorous, light and a little acrid. It is insoluble in water, soluble in ethanol, benzene and also carbon disulfide, and can be freely mixed with outright ethanol, ether, chloroform or glacial acetic acid, yet insoluble in mineral oil. The family member density is 0.956 ~ 0.969 (25 ℃), the refractive index is 1.478 ~ 1.480, the acid value is less than 2.0, the saponification worth is 176 ~ 186, and the iodine worth is 82 ~ 90.

Pure Castor Oil is mostly a glyceride of greater fat composed of ricinoleic acid (12-hydroxyoctadec-9-enoic acid) and oleic acid. R1, R2 and R3 in the molecule can be the same or various. The castor oil has castor oil. 80%-88% linolenic acid, 3%-9% oleic acid, palmitic acid, stearic acid, linoleic acid, linolenic acid, dihydroxystearic acid (Dihydroxystearieacid), the composition of glycerides is Tririci-nolein 68.2%, Diricinolein 28.0%, Monoricinolein 2.9% and also non-ricinoleate (Nonricinolein) 0.9%. Ash contains a great deal of calcium, iron, silicon, and not natural aspects light weight aluminum, copper, magnesium as well as a small amount of manganese, titanium, nickel, zinc and so forth.

Pure Castor Oil Property

Melting point 

-10 °C

Boiling point 

313 °C(lit.)


0.955 g/mL at 25 °C

refractive index 

n20/D 1.478(lit.)


>230 °F

storage temp. 

Room Temperature, under inert atmosphere


Miscible with chloroform, diethyl ether, ethanol, glacial acetic acid, and methanol; freely soluble in ethanol (95%) and petroleum ether; practically insoluble in water; practically insoluble in mineral oil unless mixed with another vegetable oil.


Viscous Hygroscopic Liquid


Clear almost colorless or slightly yellow

Specific Gravity



Slight characteristic odor

optical activity

[α]20/D +5°, c = 5 in ethanol

Water Solubility 

<0.1 g/100 mL at 20 ºC


Pure Castor Oil Uses

  1. Pure Castor Oil is taken advantage of in the production of sebacic acid, cold-resistant plasticizers, lubricating substances, scents, penetrants as well as emulsifiers for the fabric market, and so on.
  2. Pure Castor Oil is made use of to make laxatives as well as zinc prep work.
  3. Pure Castor Oil is used as a leather fatliquor. Prep work of sulfated castor oil. Ingredients and brighteners for natural leather ending up.
  4. Pure Castor Oil is utilized in launch agents; mold and mildew launch representatives; provider solvents; safety coatings.

Experiment of Pure Castor Oil Derivative Waterborne Polyurethane Resin

1.1 Experimental materials and reagents

Refined Castor Oil (TP), HCl Gas (TP), Ethanol (98%), Potassium Hydroxide, Propylene Glycol Monomethyl Ether Acetate (PMA), Ethylene Glycol (EG), Butylene Glycol (BDO), Polyethylene Butylene glycol diacid 1000 (PBA 1000), polytetrahydrofuran glycol 2000 (PTMG 2000), polyether polyol (PTMG 1000), diisocyanate (MDI-100), triethylamine (TEA), propylene glycol methyl ether acetic acid Esters (PMA) (both CP). Saturated potassium chloride solution (made in laboratory), deionized water (made in laboratory).
1.2 Preparation of Pure Castor Oil derivatives

Add 100 g of Pure Castor Oil to the three-necked flask, and feed HCl gas until the ethylenic bond is saturated (the acid potassium permanganate solution does not fade). Consume 2.47 g of HCl gas to obtain saturated castor oil with chlorine substituents, namely chlorinated saturated Pure Castor Oil. In a 1000mL four-necked flask equipped with a thermometer, a stirring device, a heating device and a reflux device, add 103g of saturated chlorinated castor oil, 100g of ethanol, and 121g of 18% KOH solution, heat up to 80~85°C, and stir the reaction for 30min to complete the saponification (The product drops into water without oil spots). The mixture was poured into 300 g saturated aqueous potassium chloride solution for high-speed dispersion, and washed with saturated potassium chloride and saturated aqueous solution to pH=8~9. The upper layer precipitate is taken and dried to obtain Pure Castor Oil potassium acid with hydroxyl groups, the average molecular weight is 352.46, and contains potassium ions and 2 hydroxyl groups, which can also be called potassium bishydroxy soap. The potassium soap solution is acidified at pH=6.6~6.8 to obtain dihydroxy ricinoleic acid, which is a dihydroxy carboxylic acid with an average molecular weight of 314.46, which can be used as a chain extender for waterborne polyurethane resins.
1.3 Preparation of PUD

1.3.1 Preparation of standard PUD
Take 100g of PTMG 1000, TDI 74.14g, DMBA 8g, and 180g of PMA (water-soluble environmentally friendly solvent), put it into a 500mL three-necked flask, heat it up to 50°C and stir until dissolved, and gradually add 21.6g of BDO (theoretical value is 24g, and the actual consumption is about 90%), and maintain the reaction at 80 °C until the viscosity rises to the specified value. Stop the reaction, cool down to below 50°C, add 8g of TEA, disperse evenly, increase the speed of the stirrer to 800r·min-1, add 270g of deionized water to obtain a standard polyurethane solution with a solid content of 30%~35%, as a control Use standard.

1.3.2 Synthesis of PUD with castor oil derivatives
Take 216.6 g of propylene glycol monomethyl ether acetate, 112 g of organic castor oil derivatives, 7.2 g of ethylene glycol, 8.0 g of butanediol, 1000 167 g of polybutylene adipate, and 55.7 g of polytetrahydrofuran glycol 2000, Put it into the reactor and heat up to 50°C, stir until dissolved, add 187.6 g of diisocyanate in stages, and maintain the reaction at 80°C until the viscosity rises to a specified value. Add 309.6 g of diluted ethanol, cool down to below 50°C, add 40 g of TEA, increase the speed of the stirrer to 800 r·min-1, and add 1100 g of deionized water to obtain MDI-100 polyurethane emulsion with a solid content of 39%.

1.4 Analysis and Testing

1.4.1 Solid content Determine the solid content according to the method of GB/T 1725-2007. Take the evaporating dish dried to constant weight, add 1~3g of resin to be tested, accurate to 0.0001g, rotate the evaporating dish to spread the sample evenly on the surface of the evaporating dish, and dry at 105°C for 60min until constant weight. Measure 3 times and take the average value. The solid content is calculated according to formula (1):


(1) Wherein, S0 is the weight of evaporating dish, g; S1 is the weight of evaporating dish+sample before drying, g; S2 is the weight of evaporating dish+sample after drying, g.

1.4.2 Mechanical properties of resin

Coat the resin with a certain thickness (such as 0.7mm) on a flat surface such as PTFE or glass, and dry it. After equilibrating at 25 °C for 3 days, the samples were cut into dumbbell-shaped sheets with a cutter for characterization and mechanical property testing.
The tensile strength and elongation at break of the film were measured using a microcomputer-controlled tensile testing machine, the tensile speed was 300 mm·min-1, and the test temperature was room temperature. The tensile properties were measured according to GB/T 528-2009.

The 100% modulus was measured using a tensile tester to measure the force at 1-fold elongation (ie, 100% elongation). The 100% modulus is calculated according to formula (2):


1.4.3 Determination of viscosity Use Brookfile RVDL-II+ viscometer to test resin viscosity according to GB/T 10247-2008. Take the above synthetic resin and stir and keep it at 25°C at a constant temperature, select the appropriate rotor and rotation speed, make the measured value within 20%~80% of the measuring range, and directly read the measured value. 1.4.4 The water absorption rate of the coating film The measurement of the water absorption rate of the coating film is carried out according to the method of reference. 1.4.5 Resin structure The infrared spectrum of WPU film was tested by Fourier transform infrared spectrometer. Dissolve an appropriate amount of WPU film in tetrahydrofuran and coat it on a potassium bromide tablet for testing. The testing range is 500-4000 cm-1.

Results and Discussion of Castor Oil Derivative Waterborne Polyurethane Resins

2.1 Properties of Pure Castor Oil derivatives to synthesize PUD

The apparent performance results of PUD synthesized by the reaction of standard PUD and castor oil derivatives are shown in Table 1, and the coating film performance results are shown in Table 2. The data in Table 1 and Table 2 show that Pure Castor Oil derivatives are used to modify waterborne polyurethane, which can improve the crosslinking density, modulus and tensile strength of waterborne polyurethane coatings, and improve the water resistance and solvent resistance of the coatings. The coating film prepared with the modified waterborne polyurethane resin synthesized by Pure Castor Oil derivatives has good appearance and fast drying speed, and can replace the solvent-based one-component waterborne polyurethane coating.


2.2 Infrared spectra of PUD synthesized by Pure Castor Oil derivatives

The infrared spectrum of water-based polyurethane is shown in Figure 3. In the figure, around 3300cm-1 and 1560~1520cm-1 are characteristic absorption peaks of N−H; 1635cm-1 is the stretching vibration absorption peak of carbonyl (C=O) double bond. These two absorption peaks are mainly generated by the reaction of diisocyanate with hydroxyl and amine groups. Near 1240cm-1 is the characteristic absorption peak of C−O−C in the urethane group, and there is no obvious absorption peak at 2267cm-1, indicating that there is no isocyanate group (−NCO) residue in the WPU film, which all indicate that the −NCO group reacted with hydroxyl groups. The results of infrared spectrum analysis showed that the castor oil derivatives participated in the reaction to form an anionic waterborne polyurethane structure.


Company Profile and Corporate Culture

Company Profile:

ZhiShang Chemical is owned by ZhiShang Group is a professional new-type chemicals enterprise combined into research and development, production and sales .

The company’s competitive product is pharmaceutical raw materials and intermediates (especially carbohydrate derivatives Series), In recent years, the company has made a major breakthrough in food and feed additives, plant extraction, industrial chemicals industry .

The company insists on the spirit of “sincere management, strict quality control, customer as god” , get consistent high praise from customers at home and abroad.

Corporate Culture:

Help China Chemicals to benefit the happiness of human life
Become the most trusted chemical supplier in the world
Striver – oriented, enrich employees, customer first, deep service, seek development
Be prepared for danger in times of peace, forge ahead actively, unity and cooperation, and be brave to fight

About Us

The production base is located in Zhangqiu chemical industry park and Tai’an high-tech chemical industry park. laboratory and workshop in strict accordance with the GMP standard and the product fit national ISO9001 and ISO2000 standards.

“Zhishang” products are exported to Europe, North and South America, the Middle East, Asia Pacific and Africa area, so as to establish a long-term and stable cooperation relationship with customer in the world.

Company Info
  • Business Type: Manufacturer
  • Product Range: Additive , Chemical Auxiliary & Catalyst , Organic Chemicals
  • Products/Service: Organic Intermediate,Inorganic Chemistry, APIs, Dyestuffs And Pigments, Fragrance And Spices, Food Additives
  • Total Employees: 51~100
  • Capital (Million US $): 10000000RMB
  • Year Established: 2016
Production Capacity
  • No. of Production Lines : 8
  • No. of QC Staff : 5 -10 People
  • OEM Services Provided : yes
  • Factory Size (Sq.meters) : 3,000-5,000 square meters
  • Certificate: ISO9001 , CE , GMP , API , MSDS
  • Factory Location : Diao Town Industry Park, Zhangqiu City, Jinan City, Shandong Province, China.


Pre-Sales Service

* Prompt reply and 24 hours online, professional team to provide best price and high quality product.

* Sample testing support.

* Every batch of products will be tested to ensureits quality.

*The packing also can be according the customers` requirment.

*Any inquiries will be replied within 24 hours.

*we provide Commerical Invoice, Packing List, Bill of loading, COA , Health certificate and Origin certificate. If your markets have any special requirements, let us know.


After-Sales Service

*The fact of logistics information monitoring.

* Any questions about the product can be consulted at any time.

*Product has any problem can return.


Do you accept sample order?

We will make samples before mass production, and after sample approved, we’ll begin mass production. Doing 100% inspection during production, then do random inspection before packing.



You can get free samples for some products,you only need to pay the shipping cost or arrange a courier to us and take the samples. You can send us your product specifications and requests,we will manufacture the products according to your requests.

What’s your MOQ?

Our MOQ is 1kg. But usually we accept less quantity such as 100g on the condition that sample charge is 100% paid.

Do you supply product report?

Yes. We’ll give you product analysis report before shipping.

  Is there a discount?

Different quantity has different discount.


1. ≤50kg, Express delivery recommended, usually called as DDU service;

2. ≤500kg, Air shipping recommended, usually called as FOB, CFR, or CIF service;

3. >500kg, sea shipping recommended, usually called as FOB, CFR, or CIF service;

4. For high value products, please select air shipping and express delivery for safe.

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