formaldehyde

(redirected from HCHO)
Also found in: Dictionary, Thesaurus, Financial, Acronyms, Encyclopedia.

formaldehyde

 [for-mal´dĕ-hīd]
a gaseous compound with strongly disinfectant properties. It is used in a 37 per cent solution (formaldehyde solution; also called formol or formalin) as a disinfectant and as a preservative and fixative for pathological specimens. The gas is toxic and carcinogenic.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.

for·mal·de·hyde

(fōr-mal'dĕ-hīd),
A pungent gas, HCHO, used as an antiseptic, disinfectant, and histologic fixative, usually in an aqueous solution.
[form(ic) + aldehyde]
Farlex Partner Medical Dictionary © Farlex 2012

formaldehyde

H2C=O, methanal Occupational safety A highly toxic, flammable gas that is highly irritating to the respiratory and conjunctival mucosa at concentrations > 2 ppm; formaldehyde is soluble in water and forms methylene bridges between denatured proteins. See Formalin.
McGraw-Hill Concise Dictionary of Modern Medicine. © 2002 by The McGraw-Hill Companies, Inc.

for·mal·de·hyde

(fōr-mal'dĕ-hīd)
A pungent gas, HCHO, used as an antiseptic, disinfectant, and histologic fixative, usually in an aqueous solution.
Medical Dictionary for the Health Professions and Nursing © Farlex 2012

for·mal·de·hyde

(fōr-mal'dĕ-hīd)
A pungent gas used as an antiseptic, disinfectant, and histologic fixative.
[form(ic) + aldehyde]
Medical Dictionary for the Dental Professions © Farlex 2012
References in periodicals archive ?
The HCHO removal percentage is 79.6% after repeated use for 10 times, indicating that the P[A.sub.6]-g-LCX-PAH sample exhibits excellent reusability and great prospect in practical application.
Laszlo (2005) prepared activated carbon from poly(ethyleneterephthalate) (APETW, APETOX) and polyacrylonitrile (APAN) for formaldehyde chemisorption and found the largest HCHO chemisorption per unit surface area happened for APAN, which was decorated with both nitrogen and oxygen functional surface groups.
En la Tabla V se resumen los sumideros y las fuentes de HCHO estimados para Parupa.
Date HCHO g/mile NOx g/mile PM g/mile 50K/100K 50K/100K miles 50K/100K miles miles See above --/-- 0.4/0.6 0.08/-- 0.015/0.018 0.4/0.6 --/0.08 0.015/0.018 0.2/0.3 --/0.08 0.008/0.011 0.2/0.3 --/0.04 --/-- 0.7/0.9 0.08/-- 0.018/0.023 0.7/0.9 --/0.10 0.018/0.023 0.4/0.5 --/0.10 0.009/0.013 0.4/0.5 --/0.05 PC = passenger car LDT light-duly truck; TLEV = transitional low emissions vehicle; LEV = low emissions vehicle; ULEV = ultra low emissions vehicle; LVW= loaded vehicle weight.
A possible mechanism for the [H.sub.2] and HCHO production over the CoS/Ti[O.sub.2] photocatalyst proposed is shown in Figure 8.
Amperometric responses were measured to various gases of HCHO, N[O.sub.2], NO, S[O.sub.2], C[O.sub.2], and CO at the applied potential of 0.75 V (versus Ag/AgCl).
Such processes are usually the most important factor in determining the efficiency of consumption of raw materials, in maintaining the integrity of product design parameters during production, maximizing the level of product quality, and maintaining environmental emission standards, such as HCHO emissions.
Major pollutants monitored for 48-hour periods were formaldehyde (HCHO), fine particles ([PM.sub.2.5]), carbon monoxide (CO), and total volatile organic compounds (TVOC).
Indoor air pollutants [sulfur dioxide (S[O.sub.2]), nitrogen dioxide (N[O.sub.2]), hydrogen sulfide ([H.sub.2]S), formaldehyde (HCHO), carbon monoxide (CO), and particulate matter] were measured using passive samplers over a 7-day period.
These two test methods were standardized to examine the removal efficiency of (mainly) particles and odors; however, recently identified chemical substances, such as HCHO and volatile organic compounds (VOCs), were not considered.
Table 2: Chemical solutions used for pretreatment Chemical Formula Concentration Sensitization solution Stannous chloride SnC[l.sub.2] 12 g/L Hydrogen chloride HCl 40 mL/L Granulated tin Sn 2 Activation solution Silver nitrate AgN[O.sub.3] 2 g/L Ammonia water N[H.sub.3].[H.sub.2]O Reduction Formaldehyde:water HCHO:[H.sub.2] 1:9 Table 3: Chemicals used for electroless depositin Chemical formula Concentration Solution A Potassium [C.sub.4][H.sub.4] 15 g/L sodium tartrate KNa[O.sub.3].4[H.sub.2]O Sodium hydrate NaOH 10 g/L Sodium carbonate N[a.sub.2]C[O.sub.3] 4 g/L Potassium [Ksub.4]Fe[[CN].sub.6].