Methyl Orange Indicator 

Product information

Grade

ACS,Reag. Ph Eur

Synonyms

4-Dimethylaminoazobenzene-4'-sulfonic acid sodium salt, Gold orange, Helianthin, Orange III

Hill Formula

C₁₄H₁₄N₃NaO₃S

HS Code

2927 00 00

EC number

208-925-3

Molar mass

327.34 g/mol

CAS number

547-58-0

MSDS

Chemical and physical data

Solubility

5 g/l (20 °C)

Melting point

>300 °C

Molar mass

327.34 g/mol

Bulk density

200 - 400 kg/m³

pH value

6.5 (5 g/l, H₂O, 20 °C)

Safety information according to GHS

Hazard Statement(s)

H301: Toxic if swallowed.

Precautionary Statement(s)

P309 + P310: IF exposed or if you feel unwell: Immediately call a POISON CENTER or doctor/physician.

Signal Word

Danger

Hazard Pictogram(s)

Storage class

6.1C Combustible, acute toxic Cat.3 / toxic compounds or compounds which causing chronic effects

WGK

WGK 3 highly water endangering

Disposal

9
Carcinogenic compounds and flammable compounds labelled "Highly toxic" or "Toxic": container F. Alkyl sulfates are carcinogenic; Take particular care to avoid inhalation and skin contact. To neutralize alkyl sulfates, add dropwise (from a dropping funnel) to concentrated ice-cool Ammonia solution (Cat. No. 105426) with vigorous stirring. Before placing in container D, check the pH with pH Universal indicator strips (Cat. No. 109535).

Safety information

R Phrase

R 25
Toxic if swallowed.

S Phrase

S 37-45
Wear suitable gloves. In case of accident or if you feel unwell, seek medical advice immediately (show the label where possible).

Categories of danger

toxic

Hazard Symbol

Toxic

Transport information

Declaration (railroad and road) ADR, RID

UN 2811 Giftiger organizer fester Stoff, n.a.g.(METHYLORANGE), 6.1, III

Declaration (transport by sea) IMDG-Code

UN 2811 TOXIC SOLID, ORGANIC, N.O.S.(METHYL ORANGE), 6.1, III

Declaration (transport by air) IATA-DGR

UN 2811 TOXIC SOLID, ORGANIC, N.O.S.(METHYL ORANGE), 6.1, III

Toxicological data

LD 50 oral

LD50 rat 60 mg/kg