ChemicalBook >> CAS DataBase List >>Cinnamic acid

Cinnamic acid

CAS No.
621-82-9
Chemical Name:
Cinnamic acid
Synonyms
cinnamic;Phenylacrylic acid;3-PHENYLACRYLIC ACID;CINNAMIC ACID, TRANS-;3-PHENYLPROPENOIC ACID;Zimtsaeure;FEMA 2288;AKOS B004228;Cinnamyl Acid;Cinnamic acid(only trans)
CBNumber:
CB0345387
Molecular Formula:
C9H8O2
Lewis structure
c9h8o2 lewis structure
Molecular Weight:
148.16
MDL Number:
MFCD00004369
MOL File:
621-82-9.mol
Last updated:2024-01-09 09:05:41

Cinnamic acid Properties

Melting point 133 °C(lit.)
Boiling point 300 °C(lit.)
Density 1.2475
refractive index 1.5049 (estimate)
FEMA 2288 | CINNAMIC ACID
Flash point >230 °F
storage temp. Sealed in dry,Room Temperature
solubility Chloroform (Slightly), Methanol (Slightly)
form Solid
pka pK (25°) 4.46
color White to Off-White
PH 3.76(1 mM solution);3.23(10 mM solution);2.72(100 mM solution)
Odor at 100.00 %. balsam sweet storax
Odor Type balsamic
Water Solubility 511.2mg/L(25 ºC)
JECFA Number 657
Stability Stable. Combustible. Incompatible with strong oxidizing agents.
LogP 2.13
CAS DataBase Reference 621-82-9(CAS DataBase Reference)
Substances Added to Food (formerly EAFUS) CINNAMIC ACID
FDA 21 CFR 172.515
EWG's Food Scores 1
FDA UNII U14A832J8D
NIST Chemistry Reference 2-Propenoic acid, 3-phenyl-(621-82-9)
EPA Substance Registry System Cinnamic acid (621-82-9)

SAFETY

Risk and Safety Statements

Symbol(GHS)  GHS hazard pictograms
GHS07
Signal word  Warning
Hazard statements  H302-H315-H319-H335
Precautionary statements  P261-P305+P351+P338
Hazard Codes  Xi
Risk Statements  36/37/38
Safety Statements  26-36
WGK Germany  1
RTECS  GD7850000
Toxicity LD50 (g/kg): 3.57 orally in rats; >5.0 dermally in rabbits (Letizia)

Cinnamic acid price More Price(27)

Manufacturer Product number Product description CAS number Packaging Price Updated Buy
Usbiological 300082 Cinnamic acid 621-82-9 20mg $255 2021-12-16 Buy
TRC C442030 Cinnamic acid 621-82-9 100g $580 2021-12-16 Buy
Chem-Impex 33956 Cinnamicacid,99-100%(GC),Natural,meetsFGspecifications,Kosher,FEMA2 99-100%(GC) 621-82-9 1KG $590.55 2021-12-16 Buy
Chem-Impex 33956 Cinnamicacid,99-100%(GC),Natural,meetsFGspecifications,Kosher,FEMA2 99-100%(GC) 621-82-9 2.5KG $1027.35 2021-12-16 Buy
Chem-Impex 33955 Cinnamicacid,99-100%(GC),meetsFGspecifications,KOSHER,FEMA2288 99-100%(GC) 621-82-9 25KG $1174.12 2021-12-16 Buy
Product number Packaging Price Buy
300082 20mg $255 Buy
C442030 100g $580 Buy
33956 1KG $590.55 Buy
33956 2.5KG $1027.35 Buy
33955 25KG $1174.12 Buy

Cinnamic acid Chemical Properties,Uses,Production

Chemical Properties

Cinnamic acid exists in cis and trans forms. the more stable isomer is the trans isomer, which occurs naturally and is the usual commercial product. It appears as white monoclinic prisms with slight cinnamon aroma. It is soluble in ethanol, methanol, petroleum ether and chloroform; it is easily soluble in benzene, ether, acetone, acetic acid, carbon disulfide and oils but insoluble in water.
Cinnamic acid
Cinnamic acid was first isolated as crystals from cinnamon oil by Trommsdorf in 1780. He thought it was benzoic acid. Dumas and Peligot ´ identified it in 1835, and in 1856 Bertagnini succeeded in synthesizing it from benzaldehyde and acetyl chloride.
Cinnamic acid undergoes reactions typical of a carboxyl group and an olefinic double bond. The carboxyl group can be esterified to form cinnamates, some of which are important flavorings and fragrances. When reacted with inorganic acid chlorides, such as thionyl chloride or phosphorus chlorides, cinnamic acid gives cinnamoyl chloride [102-92-1]. When heated, cinnamic acid forms styrene [100-42-5] and carbon dioxide. With oxidizing agents or when heated with alkali, the olefinic double bond cleaves to give benzaldehyde [98-87-3].

Physical and Chemical Properties

Cinnamic acid, also known benzal acetate, 3-phenyl-2-propenoic acid, belongs to a kind of unsaturated aromatic acid with a slight smell of cinnamon. It is presented in balsam, cinnamon oil and coca leaf in the form of free or ester form. Owing to the presence of a double bond, cinnamic acid has trans-/ cis-two isomers with the cis form containing an extra three kinds of homogeneous polycrystalline. Both trans-form and cis-form are in the presence of nature. The trans-form exists in the presence of essential oils including storax, cinnamon oil, Peruvian balsam, basil oil and cocoa leaves. The cis-form exists in Malacca galangal oil with the trans-form being more stable than the cis-form. The commercially available products are mostly in the form of trans. It has a relative molecular mass of 148.17. The first crystalline form of the cis form is called allocinnamic acid with the compound precipitated from water being monoclinic. It is colorless to white prismatic crystals with the relative density being 1.284 (4 ℃), the melting point being 42 ℃, the boiling point 265 ℃ (decomposition ) and 125 ℃ (2.533 × 103Pa); it is slightly soluble in water (25 ℃ when 0.937) but easily soluble in alcohol, ether and ethyl acetate. The second polymorph is called alpha-iso-cinnamic acid with the compound precipitated from ligroin being the monoclinic crystal. It is colorless to white prismatic crystals with the mp being 58 ℃ and the boiling point being 265 ℃. It is soluble in ethanol, acetic acid, chloroform and acetone and easily soluble in ether. The third polymorph is called beta-iso-cinnamic acid; it appears as monoclinic colorless to white prismatic crystals with the mp being 68 ℃. It is soluble in alcohol, ether, acetic acid, chloroform and acetone. Trans-isomer precipitated from dilute ethanol belongs to the monoclinic crystal and appears as white to pale yellow prismatic crystals with the relative density being 1.2475 (4 ℃), melting point being 133 ℃ and the boiling point being 300 ℃. It is very slightly soluble in water (25 ℃: 0.1; 98 ℃: 0.588), soluble in ethanol (25 ℃: 23), chloroform (15 ℃: 5.9), easily soluble in benzene, ether, acetone, acetic acid and carbon disulfide. When being distilled at 140 ℃, it undergoes decarboxylation to become styrene (Styrax BP). Upon oxidation, it generates benzoic acid. Both the cis-and trans-isomers have flower honey aroma with sweet and spicy flavor. Rat-Oral LD50: 2500 mg/kg.

Role and purpose

Cinnamic acid is an important kind of organic synthetic raw material. It is mainly used for the synthesis of methyl cinnamate, ethyl cinnamate and cinnamic acid benzyl ester. It is widely used in the perfume industry and the pharmaceutical industry. In medicine, it has been ever used as an insect repellent.
Cinnamic acid was used as spices for the preparation of cherry, apricot, honey and cinnamon aromas and flavors; it can also be used as the starting material of cinnamic acid ester. The GB2760-1996 of our country provided that cinnamic acid is allowable edible spices; in addition, it can also be used as the raw material of photosensitive resin poly vinyl cinnamic acid series; it can also be used as the raw material for the synthesis of methyl, ethyl and benzyl esters. These esters, being used as fragrances, can be applied to cosmetics and soap, it can also be used as a local anesthetic, hemostatic agents and pharmaceuticals (lactic acid Prenylamine and baclofen, etc.) raw materials; cinnamic acid may also be used as plant growth regulators and raw materials of pesticides; anti-corrosion agents of fruit and vegetables; raw material of ultraviolet agent and photosensitive resin for cosmetic sunscreen. Cinnamic acid may also be used as the standard for organic trace analysis and determination of double bond, determination of uranium and vanadium and thorium separation.

Uses

Cinnamic acid is an important intermediate in the preparation of its esters, which are used as fragrances, for pharmaceuticals, and for the enzymatic production of l-phenylalanine, the starting material for peptide sweeteners. Sodium cinnamate is a known corrosion inhibitor. Cinnamic acid is also used as a brightener in cyanide-free zinc electroplating baths, a corrosion inhibitor during removal of scale from zinc and in aerosol cans, a low-toxicity heat stabilizer for poly(vinyl chloride) , a cross-linking agent for dimethyl terephthalate – ethylene glycol copolymer and polyurethanes, a fireproofing agent for polycaprolactam, in laundry-resistant polyurethane adhesives for polyester fibers, and for improvement of the storage stability of drying-oil-modified alkyd resin coatings.

Preparation

Cinnamic acid is also produced by Knoevenagel condensation of benzaldehyde with malonic acid in the presence of weakly basic catalysts, such as ammonia and amines.
Reflux together 10ml of benzaldehyde with 10gm of malonic acid and 40ml of 8% ethanolic ammonia solution placed in a 100ml round bottom flask fitted with a reflux condensor on water bath till a clear solution is obtained (about 8-10hours). Set the assembly for downward distillation and distill off the excess alcohol. Continue heating the residual oily portion until the evolution of carbon dioxide ceases. Dissolve the residue in 20ml water, cool and add dilute hydrochloric acid till acidic. Collect the precipitated unsaturated acid on buchner funnel,wash with cold water. Recrystallise from hot water and collect crystals of cinnamic acid, m.p 132°C.
Synthesis of cinnamic acid from benzaldehyde
Synthesis of cinnamic acid from benzaldehyde

Content Analysis

Accurately weigh 500 mg of sample which have been previously dried for 3 hours in drier filled with silica gel; add 0.1mol/L hydrogen.

Toxicity

GRAS (FEMA).
The acute oral LD50 in rats is 2.5 g/kg, and the acute dermal LD50 in rabbits exceeds 5 g/kg. Cinnamic acid applied neat to intact or abraded rabbit skin for 24 h was slightly irritating;a4% solution in petrolatum produced no sensitization in man.

Limited use

FEMA (mg/kg): Soft drinks 31; Cold drink 40; Confectionery 30; Bakery 36; Gum 10.
Take moderate as the limit (FDA§172.515, 2000).

Production method

Commercial synthesis of cinnamic acid almost always results in the trans isomer.
The Perkin reaction is the oldest known method of producing cinnamic acid commercially. In this reaction benzaldehyde [100-52-7] is condensed with acetic anhydride in the presence of sodium acetate as catalyst.
Benzal chloride reacts with alkali acetate in an alkaline medium to give a high yield of cinnamic acid. Cinnamic acid can be obtained by this reaction in the presence of amines such as pyridine in more than 80 % yield.
It can also be prepared through: mixing the benzoylacetone, sodium carbonate and bleach, generating sodium cinnamic acid, followed by processing with sulfate.

Description

Cinnamic acid is a white crystalline organic acid, which is slightly soluble in water.
It is obtained from oil of cinnamon, or from balsams such as storax. It is also found in shea butter and is the best indication of its environmental history and post-extraction conditions. It can also be made synthetically.
Cinnamic acid is used in flavors, synthetic indigo, and certain pharmaceuticals, though its primary use is in the manufacturing of the methyl, ethyl, and benzyl esters for the perfume industry. Cinnamic acid has a honey- like odor; it and its more volatile ethyl ester (ethyl cinnamate) are flavor components in the essential oil of cinnamon, in which related cinnamaldehyde is the major constituent. Cinnamic acid is also part of the biosynthetic shikimate and phenyl propanoid pathways. Its biosynthesis is performed by action of the enzyme phenylalanine ammonia - lyase (PAL) on phenylalanine.
Cinnamic acid is freely soluble in benzene, diethyl ether, acetone, and it is insoluble in hexane.
Cinnamic acid is also a kind of self-inhibitor produced by fungal spore to prevent germination.

Chemical Properties

Cinnamic acid is almost odorless with a burning taste, and then turning sweet and reminiscent of apricot.

Occurrence

The trans- form has been found among the constituents of the essential oils of basil, Chinese cinnamon, Melaleuca bracteata, Alpinia galanga. It is reported found in Peru balsam, Asian and American storax and cocoa leaves. Also reported found in strawberry fruit, beer, cognac, starfruit (Averrhoa carambola L) and loquat. The cis- form is present in the oil of Alpinia malacensis.

Uses

fragrance & flavoring agent, antidiabetic

Uses

Cinnamic Acid is a flavoring agent that consists of crystalline scales, white in color, with an odor resembling honey and flowers. it is slightly soluble in water, soluble in alcohol, chloroform, acetic acid, acetone, benzene, and most oils, and alkali salts soluble in water. it is obtained by chemical synthesis. it is also termed 3-phenylpro- penoic acid.

Uses

cinnamic acid has sunscreen capabilities. Some manufacturers use it to replace PABA because of its lower allergic and phototoxic reaction incidence. Cinnamic acid is found in cinnamon leaves and cocoa leaves, and is an essential oil of certain mushrooms. It may cause allergic skin rashes.

Preparation

Two isomers, trans- and cis- exist; the trans-isomer is of interest for use in flavoring; in addition to the extraction from natural sources (storax), it can be prepared as follows: (1) from benzaldehyde, anhydrous sodium acetate and acetic anhydride in the presence of pyridine (Perkin reaction); (2) from benzaldehyde and ethyl acetate (Claisen condensation); (3) from benzaldehyde and acetylene chloride; (4) by oxidation of benzylidene acetone with sodium hypochlorite.

Definition

ChEBI: A monocarboxylic acid that consists of acrylic acid bearing a phenyl substituent at the 3-position. It is found in Cinnamomum cassia.

Synthesis Reference(s)

Journal of the American Chemical Society, 75, p. 1068, 1953 DOI: 10.1021/ja01101a016
The Journal of Organic Chemistry, 59, p. 710, 1994 DOI: 10.1021/jo00083a006

Safety Profile

Poison by intravenous and intraperitoneal routes. Moderately toxic by ingestion. A skin irritant. Combustible liquid. When heated to decomposition it emits acrid smoke and fumes.

Synthesis

Rainer Ludwig Claisen (1851–1930), German chemist, described for the first time in 1890 the synthesis of cinnamates by reacting aromatic aldehydes with esters. The reaction is known as the Claisen condensation.

Purification Methods

Crystallise the acid from *benzene, CCl4, hot water, water/EtOH (3:1), or 20% aqueous EtOH. Dry it at 60o in vacuo. It is steam volatile. [Beilstein 9 IV 2002.]

108-86-1
79-10-7
621-82-9
Synthesis of Cinnamic acid from Bromobenzene and Acrylic acid
Global( 407)Suppliers
Supplier Tel Email Country ProdList Advantage
Xi'an Kono chem co., Ltd.,
029-86107037 13289246953 info@konochemical.com China 2995 58
Hebei Yanxi Chemical Co., Ltd.
+8617531190177 peter@yan-xi.com China 5993 58
Anhui Yiao New Material Technology Co., Ltd
+86-199-55145978 +8619955145978 sales8@anhuiyiao.com China 253 58
Shanghai Daken Advanced Materials Co.,Ltd
+86-371-66670886 info@dakenam.com China 15928 58
Henan Tianfu Chemical Co.,Ltd.
+86-0371-55170693 +86-19937530512 info@tianfuchem.com China 21691 55
Hangzhou FandaChem Co.,Ltd.
008657128800458; +8615858145714 fandachem@gmail.com China 9348 55
Hefei TNJ Chemical Industry Co.,Ltd.
+86-0551-65418679 +86-18949832763 info@tnjchem.com China 2989 55
Shanxi Naipu Import and Export Co.,Ltd
+86-13734021967 +8613734021967 kaia@neputrading.com China 1011 58
career henan chemical co
+86-0371-86658258 sales@coreychem.com China 29914 58
Hubei Jusheng Technology Co.,Ltd.
18871490254 linda@hubeijusheng.com CHINA 28180 58

Related articles

View Lastest Price from Cinnamic acid manufacturers

Image Update time Product Price Min. Order Purity Supply Ability Manufacturer
Cinnamic acid pictures 2024-04-24 Cinnamic acid
621-82-9
US $13.00 / kg 1kg 99% 300tons Hebei Dangtong Import and export Co LTD
trans-Cinnamic acid pictures 2023-11-02 trans-Cinnamic acid
621-82-9
US $0.00 / kg 1kg 99% 1 tons Anhui Yiao New Material Technology Co., Ltd
trans-Cinnamic acid pictures 2023-11-02 trans-Cinnamic acid
621-82-9
US $0.00 / kg 1kg 99% 1 tons Anhui Yiao New Material Technology Co., Ltd
  • Cinnamic acid pictures
  • Cinnamic acid
    621-82-9
  • US $13.00 / kg
  • 99%
  • Hebei Dangtong Import and export Co LTD
AKOS 233-01 3-STYRYLACRYLIC ACID RARECHEM BK HC T302 TRANS-3-PHENYLPROPENOIC ACID TRANS-3-BENZENEPROPENOIC ACID TRANS-CINNAMYLIC ACID BETA-PHENYLACRYLIC ACID CINNAMIC ACID 2-PROPENOIC ACID, 3-PHENYL-, (2E)- (2E)-3-Phenyl-2-propenoic acid .beta.-Phenylpropenoicacid 3-Phenyl-2-propenoic acid (cinnamic acid) 3-phenyl-2-propenoicaci b-Phenylacrylic acid Cinnamylic acid Kyselina skoricove kyselinaskoricove tert-beta-Phenylacrylic acid tert-beta-phenylacrylicacid CitricAcidGr(Monohydrate) CinnamonAcid Benzenepropenoic acid 3-Phenylpropenoic CINNAMIC ACID, TRANS-(SH) CINNAMIC ACID TECH GRADE POWDER CINNAMIC ACID, NATURAL ZIMTSAEURE ERG.B.6 Benzeneacrylic acid Nsc9189 Wln: qv1U1r CinnaMicAcid,Mixtureofcisandtrans cinnamic acid analogue high purity Cinnamic acid kf-wang(at)kf-chem.com Cinnamic acid (b) cinnamicaci High Quality Factory Best Price CAS 621-82-9 Cinnamic Acid %, Technical, Fisher Chemical Cinnamic Acid, 99&plus AKOS B004228 3-PHENYLACRYLIC ACID 3-PHENYLPROPENOIC ACID CINNAMIC ACID, TRANS- FEMA 2288 cinnamic Zimtsaeure Phenylacrylic acid Cinnamyl Acid Cinnamic acid(only trans) cinnamicacidis(e)-3-phenylprop-2-enoicacid.itcontainsnotlessthan99.0%andnotmorethan100.5%ofc9h8O2,calculatedwithreferencetothedriedsubstance Esmolol Impurity 67 Phenol,2-[(7,8,10,11,13,14-hexahydro[1,4,7,10]tetraoxacyclododecino[2,3-g]quinazolin-4-yl)amino]- 621-82-9 40-10-3 C6H5CHCHCOOH Protein Analysis Plant Growth Regulators Auxins Mass Spectrometry