Phenyl Isothiocyanate

HCID 7673CAS 103-72-0

Basic information

Standard SMILES
S=C=Nc1ccccc1
InChIKey
QKFJKGMPGYROCL-UHFFFAOYSA-N
Molecular formula
C7H5NS
Average molar mass
135.19 g/mol
Monoisotopic mass
135.01427034

Names & identifiers

Preferred name
Phenyl Isothiocyanate
IUPAC
isothiocyanatobenzene
English name
Phenyl isothiocyanate
Molecular formula
C7H5NS
Molecular weight
135.19

Names & synonyms

IsothiocyanatobenzenePHENYL ISOTHIOCYANATE103-72-0PhenylisothiocyanatePITCThiocarbanilBenzene, isothiocyanato-PhenylsenfoelIsothiocyanic acid phenyl esterBenzene-1-isothiocyanatePhenyl thioisocyanateIsothiocyanic acid, phenyl ester
Show more names
PTCR1PITPhenyl thiocyanatePhenyl isothiocyanate,PITCPHENYL ISOTHIOCYANATE SOLUTION, FOR PROT.SEQ. ANAL.RR1H174
FenylisothiokyanatDTXSID0021129CHEBI:851030D58F84LSUNSC-5583DTXCID501129RefChem:57537Phenylisothiocyanate 1533

Database identifiers

CAS
103-72-0
PubChem CID
7673
DTXSID
DTXSID0021129
ChEMBL
CHEMBL309036
ChEBI
CHEBI:85103
UNII
0D58F84LSU
EC Number
203-138-1
Nikkaji
J5.019I

Properties

Computed structural properties

XLogP
3.3
Topological polar surface area
44.5 Ų
Hydrogen bond donors
0
Hydrogen bond acceptors
2
Rotatable bonds
1
Heavy atoms
9

Experimental & physicochemical properties

Vapor Pressure1.5 [mmHg]
Physical DescriptionLiquid; [Merck Index] Colorless liquid; [Sigma-Aldrich MSDS]
Kovats Retention Index · 2 items

1163

1138

Physicochemical properties

Melting point
21 °C · −21 °C(lit.)
Boiling point
218 °C · 218 °C(lit.)
Density
1.132 g/mL · 1.132 g/mL at 20 °C(lit.)
vapor pressure
10 hPa · 10 hPa (20 °C)
refractive index
20 · n20/D 1.6515(lit.)
Flash point
190 °F · 190 °F

Safety & regulation

GHS classification

GHS Classification · 6 items

This chemical does not meet GHS hazard criteria for 0.5% (1 of 214) of reports.

Danger

H301 (82.2%): Toxic if swallowed [Danger Acute toxicity, oral];H314 (79.4%): Causes severe skin burns and eye damage [Danger Skin corrosion/irritation];H317 (79%): May cause an allergic skin reaction [Warning Sensitization, Skin];H318 (54.7%): Causes serious eye damage [Danger Serious eye damage/eye irritation];H334 (76.2%): May cause allergy or asthma symptoms or breathing difficulties if inhaled [Danger Sensitization, respiratory];H341 (54.2%): Suspected of causing genetic defects [Warning Germ cell mutagenicity];H361 (54.2%): Suspected of damaging fertility or the unborn child [Warning Reproductive toxicity];H400 (21.5%): Very toxic to aquatic life [Warning Hazardous to the aquatic environment, acute hazard];H410 (24.3%): Very toxic to aquatic life with long lasting effects [Warning Hazardous to the aquatic environment, long-term hazard]

P203, P233, P260, P261, P264, P264+P265, P270, P271, P272, P273, P280, P284, P301+P316, P301+P330+P331, P302+P352, P302+P361+P354, P304+P340, P305+P354+P338, P316, P317, P318, P321, P330, P333+P317, P342+P316, P362+P364, P363, P391, P403, P405, and P501 (click each P-code to see the statement)

Aggregated GHS information provided per 214 reports by companies from 11 notifications to the ECHA C&L Inventory. Each notification may be associated with multiple companies.;Reported as not meeting GHS hazard criteria per 1 of 214 reports by companies.;There are 10 notifications provided by 213 of 214 reports by companies with hazard statement code(s).;Information may vary between notifications depending on impurities, additives, and other factors. The percentage value in parenthesis indicates the notified classification ratio from companies that provide hazard codes. Only hazard codes with percentage values above 10% are shown. For more detailed information, please visit ECHA C&L website.

Hazard information

Regulatory Information · 3 items

Chemical: Benzene, isothiocyanato-

Status: Active Update: 10-12-2018 https://echa.europa.eu/registration-dossier/-/registered-dossier/26134

Phenyl isothiocyanate: Does not have an individual approval but may be used under an appropriate group standard

Hazards Summary · 1 item

Dermal studies of guinea pigs demonstrate severe irritation, good absorption, and sensitization; Effects on thyroid function (decreased serum T4 levels) observed in 4-week oral study of rats; [EPA - PPRTV] Causes burns and lachrymation; May cause skin and respiratory sensitization; Inhalation may cause corrosive injuries to upper respiratory tract and lungs; Harmful by ingestion; Targets the kidney and bladder; [Sigma-Aldrich MSDS]

Hazard Classes and CategoriesAcute Tox. 3 (82.2%);Skin Corr. 1B (79.4%);Skin Sens. 1 (79%);Eye Dam. 1 (54.7%);Resp. Sens. 1 (76.2%);Muta. 2 (54.2%);Repr. 2 (54.2%);Aquatic Acute 1 (21.5%);Aquatic Chronic 1 (24.3%)

Toxicology

Treatment · 1 item

EYES: irrigate opened eyes for several minutes under running water. INGESTION: do not induce vomiting. Rinse mouth with water (never give anything by mouth to an unconscious person). Seek immediate medical advice. SKIN: should be treated immediately by rinsing the affected parts in cold running water for at least 15 minutes, followed by thorough washing with soap and water. If necessary, the person should shower and change contaminated clothing and shoes, and then must seek medical attention. INHALATION: supply fresh air. If required provide artificial respiration.

Health Effects · 1 item

Exposure to high levels of cyanide for a short time harms the brain and heart and can even cause coma, seizures, apnea, cardiac arrest and death. Chronic inhalation of cyanide causes breathing difficulties, chest pain, vomiting, blood changes, headaches, and enlargement of the thyroid gland. Skin contact with cyanide salts can irritate and produce sores. (L96, L97)

Adverse Effects · 1 item

Dermatotoxin - Skin burns.;Lacrimator (Lachrymator) - A substance that irritates the eyes and induces the flow of tears.;Skin Sensitizer - An agent that can induce an allergic reaction in the skin.;Toxic Pneumonitis - Inflammation of the lungs induced by inhalation of metal fumes or toxic gases and vapors.

Exposure RoutesInhalation (L96) ; oral (L96) ; dermal (L96)
Toxicity Summary · 1 item

Cyanide is an inhibitor of cytochrome c oxidase in the fourth complex of the electron transport chain (found in the membrane of the mitochondria of eukaryotic cells). It complexes with the ferric iron atom in this enzyme. The binding of cyanide to this cytochrome prevents transport of electrons from cytochrome c oxidase to oxygen. As a result, the electron transport chain is disrupted and the cell can no longer aerobically produce ATP for energy. Tissues that mainly depend on aerobic respiration, such as the central nervous system and the heart, are particularly affected. Cyanide is also known produce some of its toxic effects by binding to catalase, glutathione peroxidase, methemoglobin, hydroxocobalamin, phosphatase, tyrosinase, ascorbic acid oxidase, xanthine oxidase, succinic dehydrogenase, and Cu/Zn superoxide dismutase. Cyanide binds to the ferric ion of methemoglobin to form inactive cyanmethemoglobin. (L97)

Signs and SymptomsCyanide poisoning is identified by rapid, deep breathing and shortness of breath, general weakness, giddiness, headaches, vertigo, confusion, convulsions/seizures and eventually loss of consciousness. (L96, L97)

Regulatory information

Regulatory Information · 3 items

Chemical: Benzene, isothiocyanato-

Status: Active Update: 10-12-2018 https://echa.europa.eu/registration-dossier/-/registered-dossier/26134

Phenyl isothiocyanate: Does not have an individual approval but may be used under an appropriate group standard

Safety data

F
19
PPE
Faceshields, Gloves, Goggles, type ABEK (EN14387) respirator filter
wgk
3
tsca
TSCA listed
rtecs
NX9275000
ridadr
UN 1993 3/PG 2

Chemistry & industry

Pharmacology

Metabolism/Metabolites · 1 item

Cyanide is rapidly alsorbed through oral, inhalation, and dermal routes and distributed throughout the body. Cyanide is mainly metabolized into thiocyanate by either rhodanese or 3-mercaptopyruvate sulfur transferase. Cyanide metabolites are excreted in the urine. (L96)

Uses & manufacturing

Uses · 2 items

Used to derive primary and secondary amines, in sequencing of peptides by Edman degradation, and in amino acid analysis by HPLC; [Merck Index]

Phenyl isothiocyanate is a reagent used in reversed phase high-performance liquid chromatography (HPLC). (L197)

General Manufacturing InformationBenzene, isothiocyanato-: ACTIVE
Applications · 3 items

UsesPhenyl isothiocyanate is the reagent of choice in automated Edman degradation systems. However, this reagent is highly toxic and for manual modification other reagents are preferred such as dimethy laminoazobenzene isothiocyanate (Chang, 1983; Wang et al, 2000) or trifluoroethyl isothiocyanate (Bartlet-Jones et al, 1994). This last reagent has the advantage of being volatile, so that the excess of reagent is easily removed by vacuum before MS analysis (Spengler, 1997). This compound was used successfully during seven successive cycles of manual cleavage coupled with MS analysis. Nevertheless, the high reactivity of such compounds seems to shows artefactual modification such as“acetylation' of the hydroxyl groups of the Ser and Thr. Allyl isothiocyanate shows better selectivity, but again this reagent is toxic and difficult to use in manual approaches (Gu & Preswich, 1997) .

UsesPhenyl isothiocyanate acts as a derivatizing reagent for primary and secondary amines. It is used in sequencing peptides by Edman degradation and in amino acid analyses by HPLC. It is used for derivatizing N-terminal amino acids of proteins for automated sequential analysis. It is a synthon for dithiadiazafulvalenes.

General DescriptionPhenyl isothiocyanate is an aromatic isothiocyanate. It participates in dehydration reactions of alcohols. It is widely used for synthesis of various biologically important heterocyclic compounds.

Preparation methods · 1 item

PreparationSynthetic procedure for phenyl isothiocyanate in 1-mol scaleInto a 2-L jacketed flask, 91.2 g of CS2 (1.2 mol) was dropwise added to a mixture of aniline (93.0 g, 1.0 mol) and K2CO3 (276.0 g, 2.0 mol) in 700 mL of water at room temperature within a period of 2.5 h. After the addition was complete, the mixture was stirred another 2 h. Then, the mixture was cooled to 0 °C, and a solution of 92.3 g of TCT (0.5 mol) in 450 mL of CH2Cl2 was dropwise added within 4 h. After the addition was complete, the mixture was stirred another 1 h to complete the conversion. The resulting mixture was basified to pH >11 with 250 mL of 6 N NaOH and yielded a clear solution. The organic layer was separated and the aqueous layer was extracted with 150 mL of CH2Cl2. The combined organic layers were dried over anhydrous Na2SO4, filtered, and the solvent of filtrate was removed via distillation under atmospheric pressure with a 25-cm Vigreux column. The residue was vacuum distilled and the desired product fraction was collected at 72–74 °C/1 mmHg. Finally, 127.0 g of colorless liquid (94%) was obtained.

Suppliers50 total

国药集团化学试剂有限公司86-21-63210123 · [email protected]
北京华美互利生物化工010-56205725 · [email protected]
梯希爱(上海)化成工业发展有限公司021-67121386 · [email protected]
上海阿拉丁生化科技股份有限公司400-6206333 13167063860 · [email protected]
河北创海生物科技有限公司+86-86-13131129325 · [email protected]

Additional notes

DefinitionChEBI: Phenyl isothiocyanate is an isothiocyanate having a phenyl group attached to the nitrogen; used for amino acid sequencing in the Edman degradation. It has a role as an allergen and a reagent.

Related reactions

334 records

Linked notes

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