What is the UN number for hydrofluoric acid?

Chemical Identifiers

CAS Number UN/NA Number DOT Hazard Label
7664-39-3 1790 Corrosive Poison
NIOSH Pocket Guide International Chem Safety Card
Hydrogen fluoride HYDROGEN FLUORIDE

What does placard 1760 mean?

Class 8 Corrosive
1760 Placard – Class 8 Corrosive.

Is Hydrochloric acid UN 1789?

Recommended for frequently transported hazardous materials by truck, rail or aircraft. Placard includes 4 digit UN #, hazard class graphic and corresponding class number. …

What is Hydrofluosilicic acid?

Hydrofluosilicic Acid is also known as F6H2Si, Fluorosilicic Acid, Hexafluorosilicic Acid and Hydrogen Hexafluorosilicate. Hydrofluosilicic Acid is most used in aluminum production and ore refining. Similar to Hydrofluoric Acid, Hydrofluosilicic Acid is a strong corrosive capable of dissolving many storage materials.

How many people have died from hydrofluoric acid?

Although hydrofluoric acid burns are frequent, fatality is rare. In the case of massive exposure, the prognosis is generally poor. We present two fatal cases resulting from extensive exposure to hydrofluoric acid which produced acute systemic metabolic acidosis with profound hypocalcemia and hypomagnesemia.

Is hydrofluoric acid a strong acid?

In liquid anhydrous HF, self-ionization occurs: 3 HF ⇌ H 2 F + + HF − 2 Even though it is highly corrosive, hydrofluoric acid is not considered to be a strong acid because it does not completely dissociate in water. Both enthalpy and entropy conspire to reduce the acidity of H-F. Strong acids are defined by their pKa.

Whose responsibility is it to classify products?

It is the consignor’s (shipper) responsibility to classify a substance, product or organism to determine if it is dangerous goods.

What is the UN code for hydrochloric acid?

UN 1789
Placard – UN 1789 Hydrochloric Acid, Tagboard.

What is the UN number for methanol?

UN 1230
UN 1230 Flammable Liquid Placard — Methanol.

How do you neutralize Hydrofluorosilicic acid?

Liquid spill: neutralize with powdered limestone or sodium bicarbonate. Practice good housekeeping – spillage can be slippery on smooth surface either wet or dry.

What is Hydrofluosilicic acid used for?

How Is Hydrofluorosilicic Acid Used. The most commonly discussed application for this chemical is water fluoridation at water treatment plants. This process helps prevent periodontal problems and is added to drinking water.

What is the chemical formula for hexafluorosilicic acid?

Hexafluorosilicic acid is an inorganic compound with the chemical formula H 2 SiF 6 also written as (H 3 O) 2 [SiF 6]. It is a colorless liquid mostly encountered as diluted aqueous solution, from there, the second chemical notation also proposed. Hexafluorosilicic acid has a distinctive sour taste and pungent smell.

How does inhalation of hexafluorosilicic acid cause severe burns?

Inhalation of vapor produces severe corrosive effect on mucous membrane. Ingestion causes severe burns of mouth and stomach. Contact with liquid or vapor causes severe burns of eyes and skin. (USCG, 1999) U.S. Coast Guard. 1999.

Which is an octahedral anion of hexafluorosilicate?

Hexafluorosilicate is an octahedral anion; the Si–F bond distances are 1.71 Å. Hexafluorosilicic acid is only available commercially as solution.

What does H + stand for in fluorosilicic acid?

[H+]. [H+].F [Si-2] (F) (F) (F) (F)F Fluorosilicic acid appears as a colorless fuming liquid with a penetrating pungent odor. Corrosive to metals and tissue. Both the fumes and very short contact with the liquid can cause severe and painful burns. Used in water fluoridation, in hardening cement and ceramics, as a wood preservative.