N,N-Dimethyl-1,4-phenylenediamine Property

Melting point:

34-36 °C(lit.)

Boiling point:

262 °C(lit.)

Density 

1.09

refractive index 

1.5914 (estimate)

Flash point:

130 °C

storage temp. 

2-8°C

solubility 

Chloroform (Slightly), Methanol (Slightly), Water (Slightly)

pka

6?+-.0.12(Predicted)

form 

crystalline

color 

black

Water Solubility 

11 g/L (20 ºC)

Sensitive 

Light Sensitive

Merck 

14,3254

BRN 

508105

Stability:

Stable. Incompatible with acid chlorides, acid anhydrides, strong acids, strong oxidizing agents. Combustible.

InChIKey

BZORFPDSXLZWJF-UHFFFAOYSA-N

CAS DataBase Reference

99-98-9(CAS DataBase Reference)

NIST Chemistry Reference

1,4-Benzenediamine, N,N-dimethyl-(99-98-9)

EPA Substance Registry System

N,N-Dimethyl-p-benzenediamine (99-98-9)

Safety

Hazard Codes 

T

Risk Statements 

23/24/25-36/37/38

Safety Statements 

28-45-36/37/39-26

RIDADR 

UN 2811 6.1/PG 2

WGK Germany 

3

RTECS 

ST0874000

F 

8-10-23

Hazard Note 

Toxic/Keep Cold

TSCA 

Yes

HazardClass 

6.1

PackingGroup 

II

HS Code 

29215900

Hazardous Substances Data

99-98-9(Hazardous Substances Data)

Hazard and Precautionary Statements (GHS)

Symbol(GHS)

Signal word

Danger

Hazard statements

H331Toxic if inhaled

Precautionary statements

P262Do not get in eyes, on skin, or on clothing.

P264Wash hands thoroughly after handling.

P264Wash skin thouroughly after handling.

P280Wear protective gloves/protective clothing/eye protection/face protection.

P301+P310IF SWALLOWED: Immediately call a POISON CENTER or doctor/physician.

N,N-Dimethyl-1,4-phenylenediamine Chemical Properties,Usage,Production

Description

Dimethyl-p-phenylenediamine is a colorless toreddish-violet crystalline solid; Molecular weight= 136.23;Boiling point = 262℃; Freezing/Melting point = 41℃;Flash point = 90℃. Insoluble in water

Chemical Properties

grey to black solid

Uses

N,N-Dimethyl-p-phenylenediamine is a redox indicator. Readily forms stable, red radical cation, involved in a variety of redox reactions.

Uses

N,N-Dimethyl-p-phenylenediamine may be used for the preparation of molecular compounds with tetracyano-p-quinodimethane (TCNQ). Polarized absorption spectra of these molecular compounds were investigated.

Uses

Base for production of methylene blue, photodeveloper, reagent for detection of hydrogen sulfide, reagent for cellulose, organic synthesis, reagent for certain bacteria.

Definition

ChEBI: N,N-dimethyl-1,4-phenylenediamine is a substituted aniline and a diamine.

Synthesis Reference(s)

Chemistry Letters, 9, p. 439, 1980
Tetrahedron Letters, 34, p. 2441, 1993 DOI: 10.1016/S0040-4039(00)60436-7

General Description

Colorless to reddish-violet solid. Used in the production of methylene blue and photographic developer. Used as a chemical intermediate for dyes and diazonium chloride salts and as an analytical reagent to detect chloroamine in water.

Reactivity Profile

N,N-Dimethyl-1,4-phenylenediamine neutralizes acids in exothermic reactions to form salts plus water. May be incompatible with isocyanates, halogenated organics, peroxides, phenols (acidic), epoxides, anhydrides, and acid halides. Flammable gaseous hydrogen may be generated in combination with strong reducing agents, such as hydrides. Incompatible with strong oxidizers, strong acids and acid anhydrides. Also incompatible with alkalis .

Hazard

Toxic by ingestion or inhalation of vapor.

Health Hazard

Lowest toxic dose with skin effect is 14 mg/kg. Irritant to skin and eyes.

Fire Hazard

When heated to decomposition, N,N-Dimethyl-1,4-phenylenediamine emits toxic fumes of nitrogen oxides.

First aid

If this chemical gets into the eyes, remove any contact lenses at once and irrigate immediately for at least15 min, occasionally lifting upper and lower lids. Seek medical attention immediately. If this chemical contacts the skin,remove contaminated clothing and wash immediately withsoap and water. Seek medical attention immediately. If thischemical has been inhaled, remove from exposure, begin rescue breathing (using universal precautions, including resuscitation mask) if breathing has stopped and CPR if heart actionhas stopped. Transfer promptly to a medical facility. Whenthis chemical has been swallowed, get medical attention.Give large quantities of water and induce vomiting. Do notmake an unconscious person vomit.

storage

Color Code—Blue: Health Hazard/Poison: Storein a secure poison location. Store in cool, dry place awayfrom strong oxidizers and acids.

Shipping

Phenylenediamines require a shipping label of“POISONOUS/TOXIC MATERIALS.” T